PTCB Pharmacy Technician (PTCE) — All Questions

Which brand name corresponds to the generic drug atorvastatin?

• a.Zocor
• b.Pravachol
• c.Crestor
• d.Lipitor✓

Atorvastatin is marketed under the brand name Lipitor. Zocor is simvastatin, Crestor is rosuvastatin, and Pravachol is pravastatin; all four are statins, which is why the names are easily confused.

A patient brings in a prescription written for Synthroid. What is the generic name of this medication?

• a.Propylthiouracil
• b.Methimazole
• c.Liothyronine
• d.Levothyroxine✓

Synthroid is the brand name for levothyroxine, a synthetic T4 thyroid hormone. Liothyronine is synthetic T3 (Cytomel), while methimazole and propylthiouracil are antithyroid agents used for hyperthyroidism, not replacement therapy.

Prinivil and Zestril are brand names for which generic drug?

• a.Losartan
• b.Enalapril
• c.Ramipril
• d.Lisinopril✓

Lisinopril is sold as both Prinivil and Zestril. Enalapril (Vasotec) and ramipril (Altace) are different ACE inhibitors, and losartan (Cozaar) is an angiotensin II receptor blocker rather than an ACE inhibitor.

Which generic medication is sold under the brand name Glucophage?

• a.Glipizide
• b.Metformin✓
• c.Pioglitazone
• d.Glyburide

Glucophage is the brand name for metformin. Glipizide (Glucotrol) and glyburide (DiaBeta) are sulfonylureas, and pioglitazone (Actos) is a thiazolidinedione; all lower blood glucose but by different mechanisms.

A patient picks up a refill for Norvasc 5 mg tablets. Which generic name should appear on the label?

• a.Amlodipine✓
• b.Atenolol
• c.Nifedipine
• d.Diltiazem

Norvasc is amlodipine, a dihydropyridine calcium channel blocker. Atenolol (Tenormin) is a beta blocker, while nifedipine (Procardia) and diltiazem (Cardizem) are other calcium channel blockers sold under different brand names.

Omeprazole is marketed under which brand name?

• a.Protonix
• b.Prevacid
• c.Prilosec✓
• d.Nexium

Omeprazole is sold as Prilosec. Protonix is pantoprazole, Nexium is esomeprazole, and Prevacid is lansoprazole; all four are proton pump inhibitors with similar-sounding generic endings.

What is the generic name of Zoloft?

• a.Fluoxetine
• b.Sertraline✓
• c.Citalopram
• d.Paroxetine

Zoloft is the brand name for sertraline. Fluoxetine is Prozac, paroxetine is Paxil, and citalopram is Celexa; all are selective serotonin reuptake inhibitors used for depression and anxiety disorders.

Gabapentin is dispensed under which of the following brand names?

• a.Topamax
• b.Lyrica
• c.Keppra
• d.Neurontin✓

Gabapentin is marketed as Neurontin. Lyrica is pregabalin, Keppra is levetiracetam, and Topamax is topiramate; all are anticonvulsants, and pregabalin is structurally the closest relative to gabapentin.

Which generic diuretic corresponds to the brand name Lasix?

• a.Hydrochlorothiazide
• b.Bumetanide
• c.Spironolactone
• d.Furosemide✓

Lasix is furosemide. Bumetanide (Bumex) is another loop diuretic, hydrochlorothiazide is a thiazide, and spironolactone (Aldactone) is a potassium-sparing aldosterone antagonist.

A generic drug name ending in the suffix '-sartan' indicates that the medication belongs to which class?

• a.ACE inhibitors like ramipril
• b.Angiotensin II receptor blockers✓
• c.Calcium channel blockers (CCBs)
• d.Beta blockers like atenolol

The '-sartan' stem identifies angiotensin II receptor blockers such as losartan and valsartan. Ramipril is an ACE inhibitor, and that class carries the '-pril' stem; atenolol is a beta blocker, and that class carries the '-olol' stem; dihydropyridine calcium channel blockers carry the '-dipine' stem.

Alprazolam (Xanax) is a benzodiazepine. Under federal law, benzodiazepines such as alprazolam are placed in which DEA schedule?

• a.Schedule V
• b.Schedule III
• c.Schedule II
• d.Schedule IV✓

Benzodiazepines, including alprazolam, are Schedule IV controlled substances. Schedule II includes drugs such as oxycodone and amphetamine, Schedule III includes products such as ketamine and some anabolic steroids, and Schedule V includes low-dose codeine cough preparations.21 CFR 1308 (DEA schedules)

Pantoprazole belongs to which drug class?

• a.Proton pump inhibitor✓
• b.H2 receptor antagonist
• c.Prostaglandin analog
• d.Antacid

Pantoprazole is a proton pump inhibitor; the '-prazole' stem marks this class, which blocks the gastric H+/K+ ATPase. H2 receptor antagonists include famotidine, antacids are products such as calcium carbonate, and misoprostol is the prostaglandin analog used for gastric protection.

Metformin is classified as which type of antidiabetic agent?

• a.Sulfonylurea
• b.Biguanide✓
• c.DPP-4 inhibitor
• d.Thiazolidinedione

Metformin is the only biguanide in common use; it lowers hepatic glucose production and improves insulin sensitivity. Sulfonylureas such as glipizide stimulate insulin release, thiazolidinediones such as pioglitazone act on PPAR-gamma receptors, and DPP-4 inhibitors such as sitagliptin end in '-gliptin'.

Azithromycin belongs to which class of antibiotics?

• a.Cephalosporin
• b.Tetracycline
• c.Macrolide✓
• d.Fluoroquinolone

Azithromycin is a macrolide, along with erythromycin and clarithromycin. Fluoroquinolones end in '-floxacin', tetracyclines end in '-cycline', and cephalosporins usually begin with 'cef-' or 'ceph-'.

Which of the following medications is a loop diuretic?

• a.Chlorthalidone
• b.Furosemide✓
• c.Spironolactone
• d.Hydrochlorothiazide

Furosemide acts on the ascending loop of Henle and is classified as a loop diuretic. Hydrochlorothiazide and chlorthalidone are thiazide-type diuretics acting on the distal tubule, and spironolactone is a potassium-sparing agent.

In the FDA Orange Book, an 'AB' therapeutic equivalence code means that the product:

• a.Has been approved for the same indications but was never compared with the brand
• b.Has demonstrated bioequivalence and may be substituted for the reference listed drug✓
• c.May be dispensed only with written permission from the prescriber
• d.Contains a different active ingredient that produces a similar effect

An AB code means actual or potential bioequivalence problems have been resolved with adequate in vivo or in vitro data, so the product is therapeutically equivalent to the reference listed drug and can be substituted. It does not mean the ingredient differs, and no special prescriber permission is required beyond ordinary state substitution rules.FDA

A product carries a 'BX' code in the Orange Book. What does this indicate?

• a.Available data are insufficient to establish therapeutic equivalence✓
• b.The product has been withdrawn from the market for safety reasons
• c.The product is fully bioequivalent to the reference listed drug
• d.The product is available only as a brand name

Codes beginning with B indicate products the FDA does not consider therapeutically equivalent, and BX specifically means the data are insufficient to determine equivalence, so automatic substitution is not appropriate. AB is the code for demonstrated equivalence, and market withdrawal is handled through separate FDA actions, not the equivalence code.FDA

Which medication is generally considered a narrow-therapeutic-index drug for which switching between manufacturers warrants extra caution and monitoring?

• a.Ibuprofen
• b.Loratadine
• c.Amoxicillin
• d.Warfarin✓

Warfarin has a narrow therapeutic index, so small changes in blood level can cause bleeding or clotting and INR monitoring is needed after any product change. Amoxicillin, ibuprofen, and loratadine have wide margins between effective and toxic doses and are not narrow-therapeutic-index agents.

Montelukast is most commonly prescribed for which condition?

• a.Gastroesophageal reflux disease
• b.Asthma maintenance and allergic rhinitis✓
• c.Relief of an acute asthma attack
• d.Chronic obstructive pulmonary disease

Montelukast is a leukotriene receptor antagonist taken on a schedule for long-term asthma control and for allergic rhinitis. It has no bronchodilator activity, so it cannot relieve an attack that is already under way; that calls for a short-acting beta agonist such as albuterol. It is not an approved treatment for chronic obstructive pulmonary disease, and reflux is treated with acid suppressants such as omeprazole.

Tamsulosin is indicated primarily for the treatment of:

• a.Benign prostatic hyperplasia✓
• b.Erectile dysfunction
• c.Overactive bladder
• d.Urinary tract infection

Tamsulosin is an alpha-1 blocker that relaxes smooth muscle in the prostate and bladder neck, improving urine flow in benign prostatic hyperplasia. Overactive bladder is treated with antimuscarinics such as oxybutynin, erectile dysfunction with agents such as sildenafil, and urinary infections with antibiotics.

A patient is discharged after coronary stent placement with a prescription for clopidogrel (Plavix). What is the purpose of this medication?

• a.To slow the heart rate and lower blood pressure
• b.To lower LDL cholesterol and blood lipids
• c.To inhibit platelet aggregation and prevent clot formation✓
• d.To control blood glucose in type 2 diabetes

Clopidogrel is an antiplatelet agent that blocks the P2Y12 ADP receptor, reducing the risk of stent thrombosis, myocardial infarction, and stroke. Lowering LDL cholesterol and blood lipids is the role of statins such as atorvastatin, controlling blood glucose in type 2 diabetes belongs to agents such as metformin, and slowing the heart rate while lowering blood pressure is what beta blockers such as metoprolol do.

A patient newly diagnosed with hypothyroidism presents a prescription. Which medication is expected?

• a.Methimazole
• b.Prednisone
• c.Metformin
• d.Levothyroxine✓

Hypothyroidism is treated by replacing the missing hormone with levothyroxine. Methimazole suppresses thyroid hormone production and is used for hyperthyroidism, metformin treats type 2 diabetes, and prednisone is a corticosteroid used for inflammation.

Which of the following products should NOT be crushed before administration?

• a.Immediate-release lisinopril tablet
• b.Chewable montelukast tablet
• c.Enteric-coated aspirin tablet✓
• d.Scored metoprolol tartrate tablet

The enteric coating on aspirin is designed to keep the tablet intact until it passes the stomach, so crushing destroys that protection and increases gastric irritation. Immediate-release and scored tablets may generally be split or crushed, and chewable tablets are meant to be broken down in the mouth.

How should a sublingual nitroglycerin tablet be administered during an episode of chest pain?

• a.Dissolved in a glass of juice and swallowed with food
• b.Chewed thoroughly and swallowed with a sip of water
• c.Placed under the tongue and allowed to dissolve without swallowing✓
• d.Swallowed whole with a full glass of water and food

Sublingual tablets dissolve under the tongue so the drug is absorbed directly into the bloodstream through the oral mucosa, giving rapid onset and bypassing first-pass liver metabolism. Chewing and swallowing the tablet, washing it down with water, or dissolving it in juice all send the dose through the digestive tract, where first-pass metabolism removes most of it before it can relieve chest pain.

A patient is dispensed otic drops for an ear infection. Which counseling point is correct?

• a.The drops should be diluted with water before each use
• b.The drops must be refrigerated and instilled cold
• c.The drops may be used in either the ear or the eye if needed
• d.The drops are for the ear only and must never be instilled in the eye✓

Otic products are not manufactured to be sterile and isotonic for ocular use, so instilling them in the eye can cause pain and injury; ophthalmic drops, by contrast, may be used in the ear. Otic drops are normally stored at room temperature, warmed slightly in the hand if cold, and are never diluted by the patient.

Insulin glargine (Lantus) is administered by which route?

• a.Intramuscular
• b.Intradermal
• c.Intravenous
• d.Subcutaneous✓

Insulin glargine is injected into subcutaneous fat, where its slow, steady absorption produces basal coverage over about 24 hours. Intravenous administration would produce an immediate, unpredictable drop in glucose and is reserved for regular insulin, while intramuscular and intradermal routes are not used for insulin therapy.

A patient taking lisinopril reports a persistent dry, tickling cough that started a few weeks after beginning therapy. What is the most likely explanation?

• a.The cough indicates an allergic reaction requiring epinephrine
• b.Dry cough is a recognized ACE inhibitor effect related to bradykinin accumulation✓
• c.Lisinopril does not cause cough, so the symptom is unrelated
• d.The cough is a sign that the dose is too low

ACE inhibitors block breakdown of bradykinin in the respiratory tract, and the resulting dry, nonproductive cough is a well-known reason patients are switched to an ARB such as losartan. It is not an anaphylactic reaction, and the cough is dose-independent rather than a sign of underdosing.

Which symptom should a patient starting atorvastatin be told to report promptly to the prescriber?

• a.A dry, persistent cough at night
• b.Unexplained muscle pain, tenderness, or weakness✓
• c.Swelling of the ankles and feet each evening
• d.An unusually slow pulse noticed on waking

Statins can cause myopathy and, rarely, rhabdomyolysis, so new unexplained muscle pain, tenderness, or weakness needs prompt evaluation and possible creatine kinase testing. A dry persistent cough is the classic adverse effect of ACE inhibitors such as lisinopril, ankle and foot swelling is characteristic of dihydropyridine calcium channel blockers such as amlodipine, and an unusually slow pulse points toward a beta blocker such as metoprolol — none of the three is a characteristic statin effect.

A patient is starting a course of metronidazole. Which counseling point is most important?

• a.Avoid alcohol during therapy and for several days after the last dose✓
• b.Double the next dose if a dose is missed to stay on schedule
• c.Expect the urine to turn bright blue for a few days
• d.Take each dose on a completely empty stomach with water

Metronidazole combined with alcohol can produce a disulfiram-like reaction with flushing, nausea, vomiting, and palpitations, so alcohol is avoided during therapy and for a few days afterward. The drug may be taken with food to reduce stomach upset, it can darken urine to a reddish-brown rather than turning it blue, and doubling up after a missed dose raises the risk of adverse effects instead of catching the schedule back up.

A patient stabilized on warfarin asks whether it is acceptable to take ibuprofen for back pain. What is the appropriate response?

• a.Ibuprofen raises bleeding risk with warfarin; the patient should check with the prescriber first✓
• b.Ibuprofen may be taken only if the warfarin dose is skipped that day
• c.Ibuprofen decreases warfarin's effect, so the warfarin dose must be doubled
• d.Ibuprofen has no interaction with warfarin and may be taken freely

NSAIDs such as ibuprofen irritate the gastrointestinal lining and inhibit platelet function, which adds to warfarin's anticoagulant effect and increases bleeding risk, so the prescriber should be consulted and acetaminophen is often preferred. The interaction increases rather than decreases bleeding risk, and patients should never adjust or skip warfarin doses on their own.

How should unopened vials of insulin glargine be stored in the pharmacy?

• a.In the refrigerator at 2-8 °C, protected from freezing✓
• b.In a warming cabinet held at 30-35 °C
• c.At room temperature only, discarded after 7 days
• d.In the freezer at -10 °C until needed

Unopened insulin is stored in the refrigerator at 2-8 °C, where it remains stable until the manufacturer's expiration date. Freezing denatures insulin and makes the vial unusable, storage in a warming cabinet shortens potency well before the labeled expiration, and the room-temperature limit that does exist applies to a vial already in use, not to unopened stock in the pharmacy.

'Controlled room temperature' on a manufacturer's storage label corresponds to which temperature range?

• a.8-15 °C
• b.15-20 °C
• c.20-25 °C✓
• d.2-8 °C

Controlled room temperature is defined as 20-25 °C, with brief excursions permitted between 15 and 30 °C. The 2-8 °C range describes refrigeration, while 8-15 °C corresponds to a cool storage area and 15-20 °C falls below the controlled room temperature range.USP

What is the correct storage instruction for sublingual nitroglycerin tablets?

• a.Keep them in the original glass container, tightly closed and protected from light and moisture✓
• b.Keep the bottle open on the bathroom shelf so it can be reached quickly
• c.Store the bottle in the refrigerator at 2-8 °C to keep it potent longer
• d.Transfer the tablets to a weekly pill organizer so doses are not missed

Nitroglycerin is volatile and moisture sensitive, so it must remain in its original tightly closed amber glass container to preserve potency. A pill organizer and an open bottle both expose the tablets to air and to the humidity of a bathroom, and refrigeration adds condensation rather than stability. Any of these can leave the patient holding tablets that no longer work during chest pain.

Latanoprost ophthalmic solution is dispensed to a patient with glaucoma. What are the correct storage directions?

• a.Refrigerate the unopened bottle at 2-8 °C; once opened it may be kept at room temperature for up to 6 weeks✓
• b.Keep the bottle in direct sunlight, since light exposure keeps the solution clear
• c.Keep the bottle frozen and let it thaw at room temperature before the first dose is given
• d.Store it at room temperature indefinitely, with no beyond-use limit after opening

Unopened latanoprost requires refrigeration, and after the bottle is opened it may be stored at room temperature for the period stated in the manufacturer's labeling. Light exposure degrades the drug rather than keeping the solution clear, freezing is not an appropriate way to store an ophthalmic solution, and an opened bottle does carry a limited in-use period rather than none at all.

A prescription is entered for hydroxyzine 25 mg. Which medication is most likely to be selected in error because of a classic look-alike/sound-alike name pair?

• a.Hydralazine✓
• b.Hydrocodone
• c.Hydrocortisone
• d.Hydrochlorothiazide

Hydroxyzine and hydralazine are a well-documented look-alike/sound-alike pair; one is an antihistamine and the other an antihypertensive vasodilator, so a mix-up can cause serious harm. Hydrocortisone is a corticosteroid, hydrochlorothiazide a thiazide diuretic, and hydrocodone an opioid, none of which form this classic confusion pair.

Which of the following is classified as a high-alert medication?

• a.Loratadine 10 mg tablets
• b.Concentrated potassium chloride injection✓
• c.Acetaminophen 325 mg tablets
• d.Docusate sodium 100 mg capsules

Concentrated potassium chloride for injection is a high-alert medication because an undiluted dose can cause fatal cardiac arrhythmia; other high-alert classes include insulin, anticoagulants, opioids, and neuromuscular blockers. Loratadine, acetaminophen at standard strength, and docusate carry a much lower risk of catastrophic harm when an error occurs.

Product labels print certain drug names as buPROPion and busPIRone. What is the purpose of this formatting?

• a.Tall man lettering highlights the differing letters to reduce name selection errors✓
• b.Capital letters mark the product as requiring refrigeration
• c.The uppercase portion shows the manufacturer's abbreviation
• d.Capital letters indicate the drug is a controlled substance

Tall man lettering capitalizes the dissimilar portion of look-alike drug names so staff notice the difference during selection and dispensing. It carries no meaning about controlled substance status, storage requirements, or the manufacturer.

A prescription is written for clonidine to treat hypertension. Which sound-alike medication could be dispensed in error?

• a.Colchicine
• b.Clopidogrel
• c.Clonazepam✓
• d.Clindamycin

Clonidine and clonazepam are a recognized sound-alike pair; clonazepam is a benzodiazepine, so dispensing it instead of an antihypertensive could cause sedation and leave blood pressure untreated. Clopidogrel is an antiplatelet drug, clindamycin an antibiotic, and colchicine a gout agent, and none of these names is close enough to be the classic confusion partner.

A prescription reads: amoxicillin 400 mg/5 mL suspension, give 200 mg by mouth twice daily. How many mL should be given per dose?

• a.5 mL
• b.10 mL
• c.2.5 mL✓
• d.1.25 mL

Since 400 mg is contained in 5 mL, 200 mg is half that amount, or 2.5 mL per dose. The 5 mL volume would deliver 400 mg, 10 mL would deliver 800 mg, and 1.25 mL would supply only 100 mg.

An insulin product is labeled 100 units/mL. A patient is instructed to inject 18 units. What volume corresponds to this dose?

• a.0.9 mL
• b.1.8 mL
• c.0.018 mL
• d.0.18 mL✓

At a concentration of 100 units/mL, each unit equals 0.01 mL, so 18 units equals 0.18 mL. A volume of 1.8 mL would contain 180 units, 0.9 mL would contain 90 units, and 0.018 mL would contain only 1.8 units.

Ventolin HFA and Proventil HFA are brand names for which generic drug?

• a.Albuterol✓
• b.Ipratropium
• c.Levalbuterol tartrate
• d.Beclomethasone dipropionate

Ventolin HFA and Proventil HFA are albuterol sulfate metered-dose inhalers, short-acting beta-2 agonists used as rescue inhalers. Levalbuterol is the closest trap: it is the related R-isomer sold as Xopenex, not another name for these products. Ipratropium is Atrovent, an anticholinergic, and beclomethasone is an inhaled corticosteroid used for maintenance, not rescue.

Apixaban (Eliquis) belongs to which drug class?

• a.Antiplatelet agent that blocks the P2Y12 receptor
• b.Vitamin K antagonist
• c.Thrombolytic enzyme that dissolves an existing clot
• d.Direct oral factor Xa inhibitor✓

Apixaban is a direct oral anticoagulant that inhibits factor Xa and does not require routine INR monitoring. The vitamin K antagonist description is the tempting one because warfarin is also an oral anticoagulant used for atrial fibrillation, but warfarin works by blocking vitamin K-dependent clotting factor synthesis and is dosed to an INR. Clopidogrel is the P2Y12 antiplatelet and alteplase is a thrombolytic.

Generic names ending in the stem '-olol', such as metoprolol and atenolol, identify which drug class?

• a.Calcium channel blockers
• b.Beta-adrenergic blocking agents✓
• c.Alpha-1 blockers
• d.Angiotensin-converting enzyme inhibitors

The '-olol' stem marks the beta-adrenergic blocking agents: metoprolol, atenolol, propranolol, carvedilol. ACE inhibitors are the tempting choice because they treat the same conditions and are often on the same profile, but they carry the '-pril' stem, as in lisinopril and enalapril. Dihydropyridine calcium channel blockers end in '-dipine' and alpha-1 blockers such as doxazosin end in '-zosin'.

Ciprofloxacin, levofloxacin and moxifloxacin share the '-floxacin' stem. Which antibiotic class is this?

• a.Third-generation cephalosporins
• b.Macrolide antibiotics
• c.Fluoroquinolones✓
• d.Aminoglycoside antibiotics

The '-floxacin' stem identifies the fluoroquinolone antibiotics. Macrolides are the usual wrong pick because they are also broad-spectrum oral antibiotics, but they end in '-thromycin', as in azithromycin and clarithromycin. Cephalosporins begin with 'cef-' (ceftriaxone, cefdinir), and the aminoglycosides are injectable agents such as gentamicin and tobramycin.

A patient is picking up doxycycline capsules. Which counseling point belongs on this prescription?

• a.Separate each dose from dairy, antacids, and iron or calcium supplements by about two hours✓
• b.Take each dose with a full glass of milk or a serving of yogurt to reduce stomach upset
• c.Take the dose at bedtime right before lying down, when the stomach is empty
• d.No sunscreen or protective clothing is needed while taking this antibiotic

Calcium, magnesium, aluminum and iron bind tetracyclines in the gut and sharply reduce how much drug is absorbed, so doses are spaced roughly two hours from dairy, antacids and mineral supplements. The milk instruction is the tempting one because milk genuinely does settle the stomach, but it is also the single most effective way to chelate the dose; a full glass of water while staying upright gives the same comfort and also protects the esophagus, which is why the dose is not taken lying down at bedtime. Doxycycline is also photosensitizing, so sun precautions are part of the counseling rather than something that can be skipped.

Sumatriptan (Imitrex) tablets are prescribed for which purpose?

• a.Daily prophylaxis to prevent migraine attacks from occurring
• b.Relief of an acute migraine attack✓
• c.Long-term control of chronic neuropathic pain
• d.Relief of tension-type headache

Triptans are serotonin 5-HT1 agonists taken at the onset of a headache to abort that attack, and patients are told there is a limit to how many doses may be taken in 24 hours. Daily prevention is the tempting choice because migraine prophylaxis is real therapy, but it uses different drugs such as propranolol, topiramate or amitriptyline; a triptan taken every day leads to medication-overuse headache rather than prevention. Tension-type headache is the other close call: sumatriptan acts on the 5-HT1B/1D receptors of the trigeminal-vascular system that drives migraine, and it is not indicated for ordinary tension headache, which is treated with simple analgesics.

Enoxaparin (Lovenox) is dispensed in prefilled syringes. Which description of its class and route is correct?

• a.Unfractionated heparin, given only by continuous IV infusion
• b.Low molecular weight heparin, given subcutaneously✓
• c.Vitamin K antagonist, taken by mouth
• d.Direct thrombin inhibitor, taken by mouth

Enoxaparin is a low molecular weight heparin injected subcutaneously, usually into the fat of the abdomen, and it is dosed by weight without routine aPTT monitoring. Unfractionated heparin is the tempting description since both are heparins, but unfractionated heparin is a different product that is titrated by aPTT and can also be given subcutaneously, so the word 'only' makes that description wrong twice over.

Which medication is a histamine-2 (H2) receptor antagonist used to reduce stomach acid?

• a.Calcium carbonate
• b.Famotidine✓
• c.Metoclopramide
• d.Pantoprazole

Famotidine blocks histamine-2 receptors on the gastric parietal cell and lowers acid output; it is sold both by prescription and over the counter as Pepcid. Pantoprazole is the tempting selection because it also lowers acid, but it is a proton pump inhibitor that blocks the H+/K+-ATPase itself. Calcium carbonate is an antacid that neutralizes acid already in the stomach, and metoclopramide is a prokinetic that speeds gastric emptying.

A patient is dispensed a dry powder inhaler (DPI). Which instruction fits this device?

• a.Press down on the canister while inhaling slowly
• b.Shake the inhaler well and attach a valved holding chamber before inhaling
• c.Rinse the mouthpiece under running water after each dose and air-dry it
• d.Exhale away from the device, then inhale quickly and deeply✓

A DPI has no propellant, so the patient's own fast, deep breath is what pulls the powder out of the device; the patient breathes out away from the mouthpiece first, because exhaling into it adds moisture that clumps the powder. Shaking, a spacer, and pressing a canister while inhaling slowly all describe a pressurized metered-dose inhaler, and washing a DPI with water is exactly what must not be done.

What does the enteric coating on a tablet such as enteric-coated aspirin accomplish?

• a.To protect the drug from stomach acid so it dissolves in the intestine✓
• b.To make the tablet easier to swallow by smoothing it
• c.To spread the drug's release evenly over a 12- to 24-hour dosing interval
• d.To mask a bitter taste for patients who chew their tablets

An enteric coating is acid-resistant: it holds the tablet together through the stomach, which protects an acid-labile drug and spares the gastric lining, and it dissolves at the higher pH of the small intestine. Extended release is the tempting description because both are special coatings that must never be crushed, but extended release controls the rate over time while an enteric coat controls the place of dissolution. A coating can also smooth a tablet or hide a bitter taste, but those are properties of ordinary film and sugar coatings, not the reason a tablet is made enteric-coated.

A patient is dispensed a transdermal patch that is changed every 72 hours. Which counseling point is correct?

• a.Apply the patch to the same spot each time so absorption stays consistent
• b.Remove the old patch before applying a new one✓
• c.Apply the new patch over the old one to keep the drug level steady
• d.Cut the patch in half when a lower dose is wanted

Only one patch should be on the skin at a time: the old patch is peeled off and folded onto itself for disposal, and the new one goes on a clean, dry, hairless site that is rotated each time. Leaving the old patch on stacks two doses on one patient, reusing the same site is what produces local irritation, and cutting a patch can destroy the rate-controlling membrane, so patches are not cut unless the manufacturer's labeling says they may be.

A tablet is labeled for buccal administration. Which is the correct way to take it?

• a.Beneath the tongue, held there until it fully dissolves
• b.Between the cheek and the upper gum✓
• c.Chewed and then swallowed
• d.Swallowed whole with a full glass of water

Buccal means the tablet is tucked between the cheek and the gum, where it dissolves and is absorbed through the mucosa straight into the bloodstream. Sublingual placement under the tongue is the tempting answer because both routes bypass first-pass liver metabolism, but they are separate directions that print differently on the label, and swallowing or chewing the tablet sends it through the stomach and defeats the mucosal route entirely.

A patient asks whether an ophthalmic (eye) product could be used in the ear, and whether an otic (ear) product could be used in the eye. Which statement is correct?

• a.An otic product may be placed in the eye, but an ophthalmic product may not be used in the ear
• b.An ophthalmic product must never be used in the ear, and an otic product must never be used in the eye
• c.The two are interchangeable, since both are supplied as sterile solutions buffered to the same pH
• d.An ophthalmic product may be used in the ear if the prescriber directs it, but an otic product is not acceptable for use in the eye✓

Ophthalmic products are manufactured sterile and adjusted to a pH and tonicity the eye tolerates, so they already meet everything the ear canal requires, and prescribers do order an ophthalmic solution for use in the ear. Otic products are not held to the sterility and tonicity standards of an eye product and can injure the cornea, which is why the substitution runs in one direction only. A ban in both directions is the tempting answer because refusing to substitute is the safer habit, but it is stricter than the actual rule; what does hold is that the substitution comes from the prescriber and not from the patient.

A bottle of amoxicillin oral suspension is reconstituted with water at the pharmacy. What storage and discard information belongs on the label?

• a.Keep it refrigerated and use it until the expiration date printed on the bottle
• b.Refrigerate it and discard any unused portion after 7 days
• c.Store at room temperature and discard after 30 days
• d.Refrigerate it and discard any unused portion after 14 days✓

Once water is added, amoxicillin suspension carries a 14-day in-use period stated in the manufacturer's labeling, and refrigeration is preferred because it improves palatability and stability. A 7-day discard date is the closest call, because reconstituted antibiotics do not all share one in-use period, so the number has to be read off the labeling of the product actually being dispensed rather than assumed from a general rule. The expiration date printed on the bottle is the other classic error: it applies to the dry powder, and reconstitution starts a new and much shorter clock.

Which practice belongs to correct cold-chain handling of vaccines stored in a refrigerator at 2-8 °C?

• a.Keep vaccines in the refrigerator door, the easiest place to reach in a busy clinic
• b.Record the temperature once a week and adjust the thermostat as needed
• c.Keep water bottles out of the unit so that air can circulate freely
• d.Keep vaccines in the center of the unit with a continuous temperature log✓

Refrigerated vaccines belong in the middle of the storage unit, away from walls, vents, floor and door, with a digital data logger recording continuously so any excursion is detected. The door is the tempting spot because it is convenient, but it is the warmest and least stable part of the unit; water bottles are actually encouraged in the door and empty bins, since they buffer the temperature when the door is opened.

A patient is dispensed NPH insulin, a cloudy suspension. How should the vial be prepared before each dose?

• a.Draw the dose without mixing, since the particles redissolve in the syringe
• b.Shake the vial hard for about ten seconds until the liquid looks uniform
• c.Gently roll the vial between the palms✓
• d.Warm the vial under hot running water before drawing the dose

NPH is a suspension whose particles settle, so it is resuspended by gently rolling or tipping the vial until the liquid is evenly cloudy. Vigorous shaking is the tempting choice because it clearly mixes the vial, but it froths the insulin and can clump the protein, which makes an accurate dose hard to draw, and hot water is never used to warm insulin.

A prescription is written for Lamictal. Which product is the classic look-alike/sound-alike that could be selected in error?

• a.Lantus (insulin glargine)
• b.Levaquin (levofloxacin)
• c.Lamisil (terbinafine)✓
• d.Lanoxin (digoxin)

Lamictal (lamotrigine, an anticonvulsant and mood stabilizer) and Lamisil (terbinafine, an oral antifungal) share their first four letters and appear together on published confused-drug-name lists, which is why many pharmacies separate them on the shelf and confirm the indication. Lanoxin is the tempting distractor because it also begins with 'La' and is a narrow-therapeutic-index drug, but it shares only the first two letters with Lamictal, while Lamisil shares four and is the name paired with Lamictal on those lists.

A patient taking simvastatin asks whether grapefruit juice is a problem. What is correct?

• a.Grapefruit juice speeds elimination of the drug, so the dose must be doubled
• b.Grapefruit juice raises simvastatin levels and should be avoided✓
• c.Grapefruit juice binds the tablet in the gut and blocks absorption
• d.Only the juice matters; eating the whole fruit is safe

Grapefruit juice inhibits intestinal CYP3A4, so more simvastatin survives into the bloodstream and the risk of muscle toxicity rises; the same warning applies to lovastatin and to several calcium channel blockers. The furanocoumarins responsible are in the fruit itself, so eating grapefruit segments counts the same as drinking the juice, which is why limiting the warning to the juice is wrong. The 'speeds elimination' claim reverses the mechanism, since inhibiting the enzyme raises drug levels rather than lowering them, and grapefruit does not bind the tablet in the gut the way an antacid or a binding resin does.

A patient is starting phenelzine, a monoamine oxidase inhibitor. Which dietary counseling is essential?

• a.Avoid tyramine-rich foods such as aged cheese, cured meats and tap beer✓
• b.Avoid bananas and citrus fruit, the main sources of tyramine
• c.Avoid grapefruit juice, which raises the drug level
• d.Avoid dark green leafy vegetables, which reverse the drug's effect

MAO inhibitors block the enzyme that normally breaks tyramine down, so a tyramine load can release a surge of norepinephrine and cause a hypertensive crisis with severe headache and dangerously high blood pressure. Tyramine forms as protein ages, so the foods that matter are the aged, cured, fermented, smoked or spoiled ones - aged cheese, dry sausage, sauerkraut, soy sauce, tap beer - while fresh fruit such as bananas and oranges is not a significant source, which makes that list tempting but wrong. The leafy-green warning is the vitamin K counseling that belongs to warfarin, and grapefruit juice is a CYP3A4 issue unrelated to monoamine oxidase.

How should a patient take levothyroxine so that absorption stays consistent?

• a.With breakfast and a calcium supplement, so the stomach is not empty
• b.With a full glass of milk each morning
• c.At bedtime together with the evening iron tablet
• d.On an empty stomach with water, 30 to 60 minutes before breakfast✓

Levothyroxine is absorbed best from an empty stomach, so it is taken with water 30 to 60 minutes before the first food of the day, and calcium, iron and antacids are separated by about four hours because they bind it. Taking it with breakfast is the tempting choice since it helps patients remember, but food, and calcium in particular, cuts the amount absorbed and destabilizes the TSH the dose was titrated to.

A patient stabilized on warfarin asks about eating salad and spinach. What is the correct advice?

• a.Keep vitamin K intake steady from week to week rather than eliminating it✓
• b.Stop eating all green vegetables while on warfarin, because vitamin K cancels the drug
• c.Eat as much leafy green as possible to balance the blood thinner
• d.Take an extra dose on any day with a large salad

The warfarin dose is titrated against the patient's usual vitamin K intake, so steadiness is what protects the INR; big swings in either direction destabilize it. Cutting out greens entirely is the tempting advice because vitamin K really does oppose warfarin, but a sudden drop pushes the INR up and raises bleeding risk just as a sudden increase pushes it down toward clotting. Loading up on greens and adding a dose because of one meal are dangerous for the same reason: the dose is changed by the prescriber on the basis of an INR, not by the patient on the basis of dinner.

Which product may a customer buy in a United States pharmacy without a prescription?

• a.Montelukast 10 mg tablets (Singulair)
• b.Albuterol HFA inhaler (Ventolin)
• c.Loratadine 10 mg tablets✓
• d.Promethazine 25 mg tablets

Loratadine 10 mg is a second-generation antihistamine sold over the counter as Claritin and store brands. Montelukast is the tempting choice because allergy products are often OTC, but it is an oral leukotriene modifier available only by prescription. Albuterol inhalers are prescription-only in the United States, and promethazine tablets are prescription-only as well.

A customer wants an oral antihistamine for seasonal allergies that is least likely to cause drowsiness. Which is the best choice?

• a.Chlorpheniramine maleate (Chlor-Trimeton)
• b.Fexofenadine (Allegra)✓
• c.Diphenhydramine (Benadryl)
• d.Cetirizine hydrochloride (Zyrtec)

Fexofenadine is a second-generation H1 antihistamine that crosses the blood-brain barrier poorly, so it is the one labeled non-drowsy. Cetirizine is the genuinely close call: it is also second-generation, but it is the second-generation agent most associated with sedation and its labeling carries a drowsiness warning, so it is not the best answer when the customer's stated priority is staying alert. Diphenhydramine and chlorpheniramine are first-generation antihistamines that cause sedation plus anticholinergic effects such as dry mouth and urinary retention.

Percocet tablets contain which two active ingredients?

• a.Tramadol with acetaminophen
• b.Oxycodone with aspirin
• c.Oxycodone with acetaminophen✓
• d.Hydrocodone with acetaminophen

Percocet is oxycodone with acetaminophen, and its strength is written as the two ingredients together, for example 5/325 mg. Oxycodone with aspirin is the closest trap: it is the same opioid combined with aspirin instead, it is sold as Percodan, and that brand name differs from Percocet by two letters. Hydrocodone with acetaminophen is sold as Norco or Lortab, and tramadol with acetaminophen is Ultracet.

A prescription calls for a 0.125 mg dose. The tablets on hand are labeled 250 mcg. How much is one dose?

• a.One-half tablet✓
• b.Two tablets
• c.One-quarter tablet
• d.One tablet

Convert the units first: 0.125 mg x 1,000 mcg/mg = 125 mcg. Then 125 mcg divided by 250 mcg per tablet = 0.5 tablet. Checking it the other way round, 250 mcg = 0.25 mg and 0.125 mg divided by 0.25 mg = 0.5, the same answer. Two tablets comes from dividing in the wrong direction, 250 divided by 125; a whole tablet comes from assuming 0.125 mg and 250 mcg are the same amount; a quarter tablet comes from moving the decimal one place too far and treating the order as 62.5 mcg. Because the tablet on hand is larger than the dose ordered, the answer has to be less than one whole tablet.

A prescription is transmitted to the pharmacy carrying the code DAW 1. What does that code communicate?

• a.The patient asked for the brand-name product even though substitution was allowed.
• b.State law requires the brand-name product for this drug.
• c.The prescriber has required that the brand-name product be dispensed.✓
• d.The pharmacist selected the product that was dispensed.

DAW 1 records the prescriber's own instruction that no substitution be made, so the brand must be dispensed. The state-law wording describes DAW 7, which is used when a brand product is mandated by law rather than chosen by the prescriber; a patient's request for the brand is DAW 2; and pharmacist product selection is DAW 3.

What is an authorized generic?

• a.A generic approved under an abbreviated application after the brand's patent expired.
• b.An imported version of the brand product sold at a lower price.
• c.The first generic to reach the market after a successful patent challenge, during its exclusivity period.
• d.The brand-name product itself, marketed without the brand name on the label under the innovator's own FDA approval.✓

An authorized generic is the brand-name product itself, sold without the brand name under the innovator's own application, so no abbreviated application and no separate bioequivalence study are involved. The ordinary generic is the tempting choice, but that is a different manufacturer's product approved through an abbreviated application. The first generic to win exclusivity after a patent challenge is also an abbreviated-application product, and the brand company often launches an authorized generic precisely to compete with it during that exclusivity.

A biologic has been designated by the FDA as an interchangeable biosimilar. What does that designation permit?

• a.It has been shown to be chemically identical to the reference biologic, not merely highly similar.
• b.It may be substituted at the pharmacy without prescriber intervention, where state law allows.✓
• c.It may be dispensed only after the prescriber authorizes the change.
• d.It carries an AB therapeutic-equivalence rating in the FDA's Orange Book.

Interchangeability is the additional standard that permits substitution at the pharmacy without contacting the prescriber, subject to state pharmacy law; a biosimilar without that designation does not carry the same permission, which is why requiring prescriber authorization is the tempting answer. Biosimilars are highly similar rather than chemically identical, and licensed biologics are listed in the Purple Book, not the Orange Book.

Two products are pharmaceutical equivalents, but the FDA has not rated them therapeutically equivalent. What does that tell the technician?

• a.They have the same active ingredient, strength and dosage form, but bioequivalence has not been established.✓
• b.The FDA has compared the two products in a study and concluded that they are not bioequivalent to each other.
• c.They contain different active ingredients that are used for the same indication.
• d.They are made by the same company at two different plants.

Pharmaceutical equivalence covers the same active ingredient, strength, dosage form and route; therapeutic equivalence adds proof of bioequivalence, so a pharmaceutically equivalent product without that proof is not automatically substitutable. The tempting answer is that the FDA studied the pair and found them not bioequivalent — that does happen, but an unrated product may equally be one for which the data are simply insufficient, so all the technician may conclude is that equivalence has not been established.

A vial is labeled epinephrine 1:1000. Expressed as a metric concentration, what does that ratio strength mean?

• a.1 mg/mL✓
• b.10 mg/mL
• c.0.1 mg/mL
• d.1 mcg/mL

For a solution, a ratio strength means grams of drug in that number of milliliters: 1:1000 is 1 g in 1,000 mL = 1,000 mg in 1,000 mL = 1 mg/mL. The other three values are the concentrations of other ratios. 0.1 mg/mL is 1:10,000, that is 1 g in 10,000 mL — a different epinephrine presentation, which is why the two labels must never be read interchangeably. 10 mg/mL would be 1:100, and 1 mcg/mL would be 1:1,000,000. All four options are bare values of similar length, so nothing about their wording favors one over another.

A technician dissolves 25 g of a drug in enough water to make 500 mL of finished solution. What is the percentage strength (w/v)?

• a.0.05% w/v
• b.25% w/v
• c.5% w/v✓
• d.2.5% w/v

Percentage strength w/v is grams of solute per 100 mL: 25 g ÷ 500 mL = 0.05 g/mL, and 0.05 g/mL × 100 mL = 5 g per 100 mL, so the solution is 5% w/v. Checked the other way, 5% w/v means 5 g per 100 mL, which in 500 mL is 5 × 5 = 25 g. The wrong values each come from a specific slip: 0.05% is the grams per 500 mL read as a percentage, which is 100 times too dilute; 25% is simply the number of grams in the container; and 2.5% comes from dividing the 25 g by 1,000 mL, as though a full liter had been prepared.

Approximately how much sodium does one liter of 0.9% sodium chloride injection contain?

• a.77 mEq
• b.130 mEq
• c.154 mEq✓
• d.513 mEq

0.9% w/v means 0.9 g per 100 mL, or 9 g of sodium chloride per liter; 9 g ÷ 58.5 g per mole ≈ 0.154 mole, which gives roughly 154 mEq of sodium and 154 mEq of chloride per liter. Every other value is a real figure for a different fluid, which is what makes them tempting: 77 mEq is the sodium in a liter of 0.45% (half-normal) saline and is the hardest to resist because it is exactly half; 130 mEq is the sodium in lactated Ringer's; and 513 mEq is the sodium in a liter of 3% sodium chloride.

An order calls for 0.4 mg of a drug. The vial on the shelf is labeled 400 mcg/mL. What volume contains the ordered dose?

• a.0.4 mL
• b.0.1 mL
• c.10 mL
• d.1 mL✓

0.4 mg × 1,000 mcg/mg = 400 mcg, and 400 mcg ÷ 400 mcg/mL = 1 mL. Checked the other way, 1 mL of a 400 mcg/mL vial delivers 400 mcg = 0.4 mg. The 0.4 mL value is the trap: it comes from using the milligram number as the volume, as though the vial were labeled 1 mg/mL. Drawing 0.1 mL would deliver only 40 mcg, and the 10 mL value comes from mistakenly converting 0.4 mg to 4,000 mcg.

A potassium chloride oral solution is labeled 20 mEq per 15 mL. A dose of 40 mEq is ordered. What volume should be measured?

• a.60 mL
• b.30 mL✓
• c.15 mL
• d.7.5 mL

The solution supplies 20 mEq in each 15 mL, so 40 mEq is two of those volumes: 40 ÷ 20 = 2, and 2 × 15 mL = 30 mL. Checked by concentration, 20 mEq ÷ 15 mL = 1.33 mEq/mL, and 40 mEq ÷ 1.33 mEq/mL = 30 mL. The 60 mL value doubles the volume a second time by pairing 15 mL with 10 mEq instead of 20 mEq; 15 mL is one labeled dose volume and would give only 20 mEq; and 7.5 mL is half the labeled volume, which would give 10 mEq.

A vial of powdered antibiotic directs the technician to add 4.5 mL of diluent, and states that the resulting solution measures 5 mL. Why is the final volume larger than the volume of diluent added?

• a.The label rounds the 4.5 mL of diluent up to 5 mL for convenience.
• b.Air injected into the vial adds to the volume.
• c.The diluent expands as the vial warms to room temperature during mixing.
• d.The dry powder itself occupies volume once it dissolves.✓

Final volume equals diluent volume plus the space the powder occupies once dissolved — its powder volume, or displacement — which is why the label gives both numbers and why the concentration must be calculated from the 5 mL final volume, not the 4.5 mL of diluent. Two competing explanations are worth weighing: thermal expansion is real but warming a few milliliters of water changes its volume by a negligible amount, far too little to account for 0.5 mL, and the label is not rounding, since it deliberately states the two volumes separately because the difference matters to the concentration. Air injected to equalize pressure does not add to the liquid volume.

A vial containing 1 g of powdered antibiotic is reconstituted to a final volume of 4 mL. What volume delivers a 250 mg dose?

• a.0.25 mL
• b.4 mL
• c.1 mL✓
• d.0.4 mL

1 g = 1,000 mg in 4 mL, so the reconstituted concentration is 1,000 ÷ 4 = 250 mg/mL, and 250 mg ÷ 250 mg/mL = 1 mL. Checked the other way, 1 mL of a 250 mg/mL solution contains 250 mg. Drawing the whole 4 mL is the dangerous error — it would deliver the full 1,000 mg, four times the ordered dose. The 0.25 mL value comes from reading 250 mg as a quarter of a milliliter, and 0.4 mL from dividing the 4 mL by 10.

A technician must blend 50 mg of a potent powdered drug uniformly into 100 g of ointment base. Which description matches geometric dilution?

• a.Add the whole 100 g of base to the drug at once and mix vigorously until the color of the mixture looks uniform.
• b.Mix the drug with an approximately equal amount of base, then keep doubling the quantity of base added and mixing until all of it is incorporated.✓
• c.Divide the base into ten equal portions and add one portion at a time, mixing thoroughly after each addition.
• d.Wet the drug with a small amount of mineral oil to form a smooth paste, then stir that paste into the base.

Geometric dilution keeps the two quantities being combined roughly equal at every step, which is what makes a very small amount of potent drug distribute evenly through a much larger mass. Wetting the drug with mineral oil is levigation, a genuine technique but one that reduces particle size rather than guaranteeing uniform distribution; adding equal tenths of the base is the closest imitation but the first addition already overwhelms the 50 mg of drug with 10 g of base; and adding all the base at once leaves pockets of concentrated drug.

Before incorporating a gritty powdered drug into an ointment base, a technician grinds it in a mortar with a few drops of mineral oil. What is this step called?

• a.Levigation✓
• b.Geometric dilution
• c.Trituration
• d.Fusion

Levigation is the reduction of particle size by grinding a powder together with a small amount of a liquid in which the drug is not soluble — here, mineral oil as the levigating agent. Trituration is the closest competitor because it also reduces particle size by grinding, but it is done on the dry powder; the added liquid is exactly what makes this levigation. Geometric dilution is a mixing sequence rather than a grinding step, and fusion melts the components together.

Why is a compounded nonsterile preparation given a beyond-use date rather than the expiration date printed on the manufacturer's stock bottle?

• a.It is the last day the pharmacy may dispense the preparation, though the patient may keep using it afterward.
• b.The beyond-use date is simply the earliest expiration date printed on any of the ingredients used in the preparation.
• c.The manufacturer's expiration date applies only to the unopened original container, and the stability of the newly compounded preparation has not been tested.✓
• d.A beyond-use date is always shorter than an expiration date because compounded preparations are less pure than manufactured ones.

An expiration date is supported by the manufacturer's stability testing of that exact product in that exact container; once the drug is combined into a new preparation that testing no longer applies, so a beyond-use date is assigned instead. The earliest expiration among the ingredients is the tempting answer because it genuinely caps the dating, but it is a ceiling on the beyond-use date rather than the reason one exists. A beyond-use date usually is shorter than a manufacturer's expiration date, but that reflects untested stability of the new preparation, not any assumption that compounded products are impure; and it is the date beyond which the preparation should not be used, not merely a last day to dispense it.USP <795>

An intravenous order specifies D5NS. Which solution does that abbreviation name?

• a.5% dextrose in 0.45% sodium chloride
• b.5% dextrose in sterile water with no added sodium
• c.5% dextrose in 0.9% sodium chloride✓
• d.5% dextrose in lactated Ringer's solution

NS stands for normal saline, which is 0.9% sodium chloride, so D5NS is 5% dextrose in 0.9% sodium chloride. The 0.45% version is the tempting near-miss: that is half-normal saline, written D5 1/2NS, so reading NS loosely as any saline concentration would halve the sodium the patient receives. Dextrose in sterile water alone is D5W, and dextrose in lactated Ringer's is written D5LR.

Which statement correctly describes lactated Ringer's solution?

• a.A hypertonic electrolyte solution given to raise serum sodium quickly in symptomatic hyponatremia.
• b.An isotonic crystalloid containing sodium, potassium, calcium, chloride and lactate.✓
• c.A protein-containing colloid used to expand plasma volume.
• d.Sodium chloride 0.9% to which the manufacturer has added 5% dextrose.

Lactated Ringer's is an isotonic electrolyte (crystalloid) solution, and its calcium content is the reason it is incompatible with some drugs that plain saline tolerates. Hypertonic sodium chloride, not lactated Ringer's, is the fluid used to raise serum sodium quickly; 0.9% sodium chloride with 5% dextrose added is D5NS; and a protein-containing volume expander such as albumin is a colloid, a different category of fluid altogether.

Why are strongly hypertonic intravenous solutions usually infused through a central venous catheter rather than a small arm vein?

• a.They irritate the lining of small peripheral veins and can cause phlebitis.✓
• b.The high osmolarity would pull water out of red blood cells and make them shrink.
• c.A peripheral vein cannot deliver the flow rate that a hypertonic solution requires.
• d.A hypertonic solution must be given by pump, which peripheral lines lack.

A solution far more concentrated than blood inflames the wall of a small vein and can cause phlebitis and thrombosis, whereas the rapid blood flow through a large central vein dilutes it almost immediately. Two distractors deserve weighing: red cells do shrink transiently in a hypertonic solution, but that happens wherever the solution is infused and is not what limits peripheral use — damage to the vein wall is. Flow rate is the other tempting alternative, but peripheral lines can run quickly and can be run on the same infusion pumps, so neither achievable rate nor pump availability drives the choice of access.

A technician repackages tablets from a bulk bottle into unit-dose blisters for a hospital's automated cabinets. What must the repackaged label carry at a minimum?

• a.The drug name and strength, a lot or control number, and a beyond-use date.✓
• b.The drug name and strength only; the lot number stays in the log.
• c.The patient's name, prescription number and directions for use, as on a dispensed label.
• d.Only the manufacturer's original expiration date, copied unchanged.

A repackaged unit-dose label has to identify the product and let it be traced and dated: drug name and strength, a lot or control number tying it back to the source container, and a beyond-use date for the new package. Keeping the lot number only in the repackaging log is the tempting answer, but a single blister found in a cabinet has to be traceable on its own when a recall lands. The original expiration date does not carry over to a new container, and a patient name and directions belong on a dispensed prescription label, not on floor stock repackaged in advance for whichever patient later needs it.

A pharmacy sets a par level for each fast-moving product. What does the par level represent?

• a.The number of times the pharmacy's whole inventory is sold and replaced in a year.
• b.The largest quantity of a product the pharmacy is permitted to keep on hand.
• c.The stock quantity at which the product is reordered.✓
• d.The quantity ordered on each purchase order.

A par level is the on-hand quantity that triggers an order, so routine purchasing keeps the shelf between the par level and the intended maximum. Counting how often the whole inventory is sold and replaced in a year is the turnover rate — a related and tempting choice, but it measures how hard the money in inventory is working rather than when to reorder a single item. How much to buy each time is the order quantity, a separate decision from the level that triggers the order, and nothing caps how much of an ordinary product a pharmacy may keep on hand.

A pharmacy rotates stock using first-expired-first-out. How does that differ from shelving by the date each package was received?

• a.The package with the earliest expiration date is placed in front, even if it arrived later.✓
• b.Short-dated stock is moved to the back so it is not dispensed by mistake.
• c.Packages are arranged by lot number so recalls can be pulled quickly.
• d.The package that arrived first is always placed in front, regardless of its expiration date.

First-expired-first-out shelves stock by expiration date, so a box received today that expires in three months goes in front of one received last month that expires in a year. Ordering by arrival date is first-in-first-out, the closest competitor: it usually gives the same result, but it fails exactly when a newer shipment carries the shorter dating. Moving short-dated stock to the back guarantees it will expire unused, and arranging by lot number helps with recalls but does nothing about dating.

A pharmacy's vaccine refrigerator is found in the morning reading outside its required temperature range. What should be done with the vaccine inside?

• a.Discard every dose at once, because any temperature excursion makes vaccine unusable.
• b.Mark it 'do not use', keep it stored properly, and seek viability guidance.✓
• c.Put it back into routine use as soon as the refrigerator holds the correct temperature.
• d.Move it to the freezer until the refrigerator has been repaired.

Vaccine exposed to an out-of-range temperature is separated and labeled so nobody administers it, but it is not automatically thrown away — the manufacturer or the immunization program decides whether the exposure has affected it. Simply resuming use once the temperature recovers is the tempting shortcut, but it ignores the exposure that has already happened; discarding everything immediately wastes doses that may still be viable; and a freezer is not an approved storage condition for a refrigerated vaccine.

The pharmacy receives a Class I recall notice naming specific lot numbers of an injectable product. What is the pharmacy's immediate responsibility?

• a.Wait for the wholesaler to collect the recalled product on its next scheduled delivery run.
• b.Notify the FDA in writing that the recalled lot was received.
• c.Identify and immediately quarantine every unit of the affected lots still in the pharmacy.✓
• d.Remove every strength and lot of that drug from the shelves, whatever the lot number.

A Class I recall means use of the product could cause serious harm or death, and the pharmacy's first job is to find the named lots and take them out of dispensable stock before another dose reaches a patient. Pulling every lot of the drug is the tempting over-correction: it is not what the notice requires and it creates a shortage of product that is still safe to dispense. Waiting for the wholesaler leaves the recalled units in reach of a dispensing error, and the recalling firm, not each pharmacy, reports back to the FDA.

Which FDA resource lists licensed biological products, including biosimilar and interchangeable products?

• a.The Orange Book, the therapeutic-equivalence list
• b.The Green Book, the animal-drug approval list
• c.The Purple Book✓
• d.The Red Book

Licensed biologics, including biosimilars and interchangeable biosimilars, are listed in the Purple Book. The Orange Book is the closest competitor because it is also an FDA listing used for substitution decisions, but it covers drugs approved under new and abbreviated drug applications and carries the therapeutic-equivalence codes; the Green Book is the FDA's animal-drug listing; and the Red Book is a commercial drug-pricing reference rather than an approval list.

A technician needs to know whether two injectable drugs may be combined in the same intravenous solution. Which reference is built to answer that question?

• a.The FDA Orange Book, which rates therapeutic equivalence
• b.The Red Book
• c.The USP-NF, which sets identity and purity standards
• d.Trissel's Handbook on Injectable Drugs✓

Trissel's Handbook on Injectable Drugs is the standard compatibility and stability reference for parenteral products, tabulating which injectables can share a syringe or a bag and for how long. The USP-NF is the tempting alternative because it is also an official standard, but it defines identity, strength, quality and purity — it does not tabulate drug-to-drug admixture compatibility. The Orange Book rates therapeutic equivalence for substitution, and the Red Book is a pricing reference.

A drug is described as having a half-life of about six hours. What does half-life measure?

• a.The time from administration until the drug first begins to produce an effect.
• b.The time for the plasma concentration to fall by half.✓
• c.The fraction of an oral dose that reaches the systemic circulation.
• d.The length of time the drug's effect lasts after a single dose.

Half-life is the time required for the amount of drug in the plasma to drop to 50% of its previous value, which is what shapes the dosing interval and how long a drug takes to clear. The time until an effect first appears is onset and how long the effect lasts is duration — both describe the patient's response rather than the fall in drug concentration, and the fraction of an oral dose reaching the circulation is bioavailability.

A patient has taken metoprolol for high blood pressure for two years and asks whether she can simply stop it now that her home readings are normal. Which counselling point applies to beta blockers?

• a.It may be stopped whenever the readings return to normal for a full week
• b.It is only needed on days when blood pressure feels high
• c.It can be switched to every other day once home readings are normal
• d.It should not be stopped suddenly; the prescriber tapers the dose✓

Long-term beta blockade up-regulates beta receptors, so stopping the drug abruptly can produce rebound tachycardia and hypertension and, in a patient with coronary disease, angina or infarction; prescribers step the dose down instead. Normal readings mean the drug is working, not that it is no longer needed. Moving to alternate days is self-tapering by another name and leaves the pressure uncovered on the off days, and beta blockers are never taken as needed for how blood pressure 'feels' — hypertension has no reliable symptoms.

Swelling of the ankles and feet that is not caused by fluid overload is a recognized, dose-related effect of which cardiovascular drug class?

• a.Calcium channel blockers such as amlodipine✓
• b.ACE inhibitors such as enalapril
• c.Loop diuretics such as furosemide
• d.Thiazide diuretics such as hydrochlorothiazide

Amlodipine, nifedipine and the other dihydropyridine calcium channel blockers dilate arterioles far more than veins, which raises pressure in the capillary bed and pushes fluid into the tissue, producing dose-related ankle edema that is not heart failure and responds poorly to a diuretic. ACE inhibitors are the tempting answer because bradykinin build-up is a well-known class effect, but bradykinin produces a dry cough and angioedema of the face and airway rather than gradual ankle swelling. Loop and thiazide diuretics remove fluid rather than causing swelling; thiazides do lower potassium, but potassium loss does not cause edema.

A woman of childbearing age was switched from lisinopril to losartan because of a persistent dry cough. Which precaution still applies after the switch?

• a.Potassium levels no longer need monitoring on losartan
• b.Losartan may be used safely during pregnancy, unlike lisinopril
• c.Both classes carry a boxed warning against use in pregnancy✓
• d.The cough should resolve within a few days

ACE inhibitors and ARBs both carry a boxed warning for fetal toxicity and are stopped as soon as pregnancy is detected, so moving from lisinopril to losartan removes the cough but not that risk. Assuming an ARB is safe in pregnancy because it is a different class is the misconception this question targets. Both classes also raise serum potassium, so monitoring continues, and ACE-inhibitor cough typically fades over one to several weeks after stopping, not within days.

A patient starting spironolactone should be cautioned about routinely using which everyday grocery product?

• a.Bananas and other high-potassium fruit
• b.Aged cheese and cured meats
• c.Salt substitutes✓
• d.Cranberry juice cocktail

Spironolactone is a potassium-sparing diuretic: it holds potassium back rather than wasting it, so an extra potassium load can push the serum level high enough to cause dangerous arrhythmias. Most supermarket salt substitutes replace sodium chloride with potassium chloride and are then shaken freely over food at every meal, so the amount taken in is unmeasured and repeated — which is why salt substitutes, along with potassium supplements, are the products named in the counselling. High-potassium foods such as bananas are the defensible second answer and are worth raising, but a portion of fruit is a fixed, self-limiting amount that most patients with normal kidney function tolerate. Aged cheese and cured meats carry the tyramine caution taught for MAO inhibitors, and cranberry juice is the product patients associate with warfarin; neither affects spironolactone.

Digoxin is a narrow-therapeutic-index drug. Which set of complaints is classically associated with digoxin toxicity?

• a.Dry cough, hoarseness, and a metallic taste in the mouth
• b.Ringing in the ears and hearing loss developing over several days
• c.Nausea, loss of appetite, and visual disturbances such as yellow-green halos✓
• d.Swollen gums and unusual hair growth on the arms

Because the toxic and therapeutic concentrations of digoxin sit so close together, technicians are taught the early picture: gastrointestinal upset with nausea and anorexia, confusion or fatigue, and the characteristic visual changes of blurred or yellow-green tinted vision with haloes around lights. Tinnitus with hearing loss points instead to salicylate or aminoglycoside toxicity, while gum overgrowth with increased body hair is the classic phenytoin picture.

A patient's profile shows both insulin lispro and insulin glargine. How do the two products differ in category?

• a.Lispro is intermediate-acting and glargine is short-acting mealtime insulin
• b.Both are basal insulins, so the pair duplicates therapy
• c.Lispro is basal; glargine is given with meals
• d.Lispro is rapid-acting; glargine is long-acting basal✓

Insulin lispro is a rapid-acting analogue given around meals to cover the carbohydrate in that meal, while insulin glargine is a long-acting analogue that supplies steady background coverage; a basal-plus-mealtime pair on one profile is a normal regimen, not a duplication, which is why the duplicate-therapy answer is tempting but wrong. Reversing the two roles is the dangerous error, because glargine is not sized to a meal and lispro cannot hold glucose steady overnight.

Which class of oral antidiabetic drugs most often requires the patient to be counselled on recognizing and treating low blood sugar?

• a.Sulfonylureas such as glipizide and glyburide✓
• b.Biguanides such as metformin
• c.Alpha-glucosidase inhibitors such as acarbose and miglitol
• d.SGLT2 inhibitors such as empagliflozin

Sulfonylureas stimulate the pancreas to release insulin whether or not blood glucose is high, so a missed meal, extra exercise or a dose taken twice can drop blood sugar too far — the patient needs to recognize the shakiness-and-sweating picture and keep glucose tablets to hand. Metformin is the tempting choice because it is the most-dispensed oral diabetes drug, but it works by lowering hepatic glucose output and does not force insulin release, so on its own it rarely causes hypoglycemia. Acarbose and miglitol slow the digestion of carbohydrate and empagliflozin sends glucose out in the urine; neither pushes insulin out of the pancreas, so hypoglycemia with them is uncommon unless they are combined with insulin or a sulfonylurea.

Which administration instruction belongs on a levothyroxine prescription label?

• a.Take together with the morning calcium and iron supplements
• b.Take in the morning on an empty stomach✓
• c.Take at bedtime with a snack to prevent insomnia
• d.Take with the largest meal of the day to reduce nausea

Levothyroxine absorption is reduced by food and cut sharply by calcium salts, iron salts and some antacids, so the standard direction is to take it in the morning on an empty stomach with water and to separate those products by several hours. Taking the tablet alongside the morning calcium and iron is the specific habit that produces unexplained treatment failure and repeated dose increases. Levothyroxine is not a sedating drug and is not given with a snack.

A patient who has taken prednisone daily for several weeks is given a new prescription written as a stepwise decreasing dose. Why is the dose stepped down instead of simply stopped?

• a.The taper prevents the allergic reactions that follow sudden steroid withdrawal
• b.The falling dose is needed to stop the drug from accumulating in fat tissue
• c.The taper prevents opioid-style withdrawal and craving
• d.Abrupt withdrawal can leave adrenal hormone output suppressed✓

Weeks of an oral corticosteroid suppress the hypothalamic-pituitary-adrenal axis, so the adrenal glands need time to resume making cortisol; stepping the dose down lets that recovery happen. Stopping abruptly risks adrenal insufficiency — fatigue, weakness, nausea and low blood pressure — which candidates often mislabel as an allergic reaction, but this withdrawal is a hormone problem, not an immune one, and it is not opioid-type dependence with craving either. Prednisone is not stored in fat tissue in a way that would dictate the schedule.

A patient is dispensed doxycycline capsules. Which counselling point matters most?

• a.Store the capsules in the refrigerator
• b.Take each dose with a glass of milk to prevent stomach upset from the drug
• c.Take it with an antacid to protect the stomach
• d.Separate it from dairy, antacids and iron, and avoid strong sun✓

Tetracyclines bind calcium, magnesium, aluminium and iron, so milk, antacids and iron salts sharply reduce how much doxycycline is absorbed and must be separated from the dose; the class also causes photosensitivity, so sun protection is advised. Taking it with milk is the intuitive answer for a drug that upsets the stomach, and it is exactly what defeats the antibiotic. Doxycycline is stored at controlled room temperature, not refrigerated.

Which adverse effect is the subject of a boxed warning shared by fluoroquinolones such as levofloxacin and ciprofloxacin?

• a.Permanent blue-grey discoloration of the skin and nails
• b.Tendinitis and tendon rupture✓
• c.Aortic aneurysm and aortic dissection
• d.Irreversible hearing loss with prolonged treatment

The fluoroquinolone boxed warning covers tendinitis and tendon rupture — most often the Achilles tendon — with the risk highest in older patients, in those also taking a corticosteroid and in transplant recipients, so patients are told to report new tendon pain or swelling and to rest the limb. The same boxed warning also names peripheral neuropathy, central-nervous-system effects and worsening of myasthenia gravis. Aortic aneurysm and dissection is the defensible second answer, because the FDA did add that risk to fluoroquinolone labelling, but it sits in Warnings and Precautions rather than in the boxed warning. Blue-grey skin and nail discoloration belongs to minocycline, and hearing loss to the aminoglycosides.

Why is amoxicillin/clavulanate prescribed instead of plain amoxicillin for some infections?

• a.Clavulanate is a second antibiotic that kills organisms amoxicillin cannot reach
• b.Clavulanate inactivates bacterial beta-lactamase enzymes✓
• c.Clavulanate slows kidney clearance so amoxicillin levels stay higher
• d.Clavulanate reduces the diarrhea amoxicillin can cause

Clavulanate has almost no useful antibacterial activity of its own; it binds and inactivates the beta-lactamase enzymes that resistant organisms use to destroy amoxicillin, which restores the amoxicillin's effect. Calling it a second antibiotic is the tempting answer because the product name lists two ingredients, but the roles are drug and protector, not two drugs. Blocking renal clearance to raise penicillin levels describes probenecid, and clavulanate does not settle the gut — it is the component most associated with the extra diarrhea the combination causes.

Nystatin oral suspension is dispensed to an adult for oral thrush. Which patient direction is correct?

• a.Dilute the dose in a full glass of water and drink it quickly
• b.Apply the dose to the gums with a cotton swab only
• c.Take the dose with a meal to improve absorption
• d.Swish in the mouth, then swallow✓

Nystatin is essentially not absorbed from the gastrointestinal tract; it works by direct contact with the yeast, so the dose is held and swished around the mouth as long as possible to coat the lesions before it is swallowed. Diluting it and drinking it straight down destroys that contact time, which is the whole mechanism. Painting the dose onto the mucosa with a swab is a technique used for an infant who cannot swish, not the direction for an adult, and taking it with food cannot improve absorption because systemic absorption is not how the drug works.

A patient starting sertraline for depression asks when she should expect to feel better. What is the accurate counselling point?

• a.No change in the first week means the drug has failed
• b.Mood should lift within two or three doses; if not, the dose is too low
• c.Full antidepressant benefit usually takes several weeks✓
• d.The drug works best taken only on bad days

SSRIs are taken every day, and while sleep, appetite and anxiety often improve first, the full effect on mood builds over several weeks — which is why patients are urged to keep taking the drug through an unchanged first week instead of concluding that it has failed. Expecting relief within two or three doses is the misconception that drives early discontinuation, and it also pushes patients to demand dose increases the prescriber has not judged necessary. An SSRI taken only on bad days will not work at all.

A patient stabilized on lithium asks whether she can buy ibuprofen for her sore back. Why does this combination matter?

• a.Ibuprofen inactivates lithium in the stomach, so the mood benefit is lost
• b.NSAIDs can reduce lithium clearance and push lithium levels into the toxic range✓
• c.Lithium blocks the pain relief that ibuprofen would give
• d.NSAIDs speed lithium removal, so the level falls below the effective range

Lithium is cleared almost entirely by the kidney and has a narrow therapeutic range, so anything that cuts renal excretion can raise the level into toxicity; NSAIDs reduce the prostaglandin-mediated renal blood flow that lithium clearance depends on. Dehydration, a low-salt diet and thiazide diuretics act the same way, which is why lithium patients are told to keep fluid and salt intake steady. The direction of the interaction is what has to be right: NSAIDs push the lithium level up, not down. Ibuprofen does not chemically destroy lithium, and lithium does not block analgesia.

Patients taking atypical (second-generation) antipsychotics such as olanzapine or quetiapine are routinely monitored for which class effect?

• a.Loss of kidney and thyroid function needing periodic labs
• b.Weight gain with rises in blood glucose and lipids✓
• c.A drop in white cells needing weekly counts
• d.Falling potassium levels that require ongoing supplementation

Second-generation antipsychotics are associated with metabolic effects, so weight, waist measurement, fasting glucose or A1c and a lipid panel are followed on a schedule; olanzapine and clozapine carry the greatest metabolic burden and aripiprazole and ziprasidone the least. Regular white-cell counts are the defensible second answer, but mandatory absolute-neutrophil-count monitoring belongs to clozapine under its REMS program, not to the class as a whole. Periodic kidney and thyroid testing is the monitoring pattern taught for lithium, and these drugs do not waste potassium.

A patient picking up hydrocodone/acetaminophen tablets also brings a multi-symptom OTC cold product to the register. Which risk should be raised?

• a.Duplicate hydrocodone, because most cold products contain an opioid
• b.Duplicate acetaminophen from two products, risking liver injury✓
• c.The cold product will block the opioid from being absorbed
• d.The two products cancel each other's pain relief

Acetaminophen is hidden inside many combination prescription analgesics and inside most multi-symptom cold and flu products, so taking both can add up to an unintended overdose and liver injury; patients are taught to read the active-ingredient panel before combining anything with a prescription analgesic. Worrying about duplicate opioid is the tempting parallel, but hydrocodone is never sold over the counter in a shelf cold remedy. Neither product blocks the absorption or the analgesic effect of the other.

A patient taking naproxen twice daily for arthritis asks about adding ibuprofen for a headache. What is the correct counselling point?

• a.Adding ibuprofen is safe when both are taken with food
• b.Ibuprofen may be added because it works by a different mechanism
• c.Combining them is fine if the doses are taken 6 hours apart
• d.Two NSAIDs should not be combined✓

Naproxen and ibuprofen are both non-selective NSAIDs working through the same cyclo-oxygenase pathway, so stacking them multiplies the gastrointestinal bleeding, kidney and cardiovascular risks without adding useful pain relief; acetaminophen is the usual add-on instead. Spacing the doses by a few hours or taking them with food eases stomach upset but does nothing about the additive risk, which is why those answers are tempting and still wrong.

How is sumatriptan used in the management of migraine?

• a.It is taken on a fixed daily schedule regardless of symptoms
• b.It is saved until the headache becomes severe
• c.It is taken every night to prevent attacks from developing
• d.It is taken to treat a migraine attack once it starts✓

Triptans are abortive, or acute, migraine treatments: the dose is taken when an attack begins and works best when taken early, and the patient is given a limit on how many doses to use in a period. Migraine prevention uses a different group of drugs taken daily whether or not a headache is present — propranolol, topiramate and amitriptyline are typical examples — which is what makes the daily-dosing answers tempting. Waiting until the pain is severe is the common patient habit that makes a triptan work less well, which is why the counselling is to treat as soon as the attack is recognized.

A patient with asthma is dispensed both an albuterol inhaler and a fluticasone inhaler. Which statement describes their roles correctly?

• a.Albuterol relieves attacks; fluticasone prevents them✓
• b.Albuterol is the daily controller and fluticasone is the rescue drug
• c.Both are rescue inhalers, so either may be used during an attack
• d.Fluticasone is used first at the onset of wheezing to open the airways

Albuterol is a short-acting beta-2 agonist that relaxes bronchial smooth muscle within minutes, so it is the rescue inhaler, while inhaled fluticasone is a corticosteroid that reduces airway inflammation over days to weeks and is used every day whether or not the patient has symptoms. Reaching for the steroid inhaler during an attack is the dangerous reversal, because it does nothing quickly. Needing the rescue inhaler often is a signal that the controller regimen should be reviewed.

Why is a patient using an inhaled corticosteroid told to rinse the mouth and spit after each dose?

• a.Rinsing washes the propellant away before it stains the teeth
• b.Rinsing prevents the bitter taste from lingering
• c.Rinsing stops the inhaler from clogging
• d.Residual steroid in the mouth can cause oral thrush✓

Much of an inhaled corticosteroid dose lands on the mouth and throat rather than the lung, where it locally suppresses defences and lets Candida overgrow, producing oral thrush and hoarseness; rinsing and spitting after each dose removes that residue and also lowers the amount swallowed. Clearing the taste is a genuine side benefit of rinsing but not the reason the direction is given, and the propellant does not stain teeth or block the actuator in a way that rinsing the mouth would fix.

A patient who drives a delivery van asks which antihistamine on the shelf is least likely to make him drowsy. Which product fits?

• a.Chlorpheniramine (Chlor-Trimeton)
• b.Diphenhydramine (Benadryl)
• c.Loratadine (Claritin)✓
• d.Promethazine (Phenergan)

Loratadine is a second-generation antihistamine that crosses into the brain poorly, so it is among the least sedating options along with fexofenadine; cetirizine is also second-generation but causes drowsiness in some people. Diphenhydramine, chlorpheniramine and promethazine are all first-generation agents whose sedation is pronounced — diphenhydramine is sold as an over-the-counter sleep aid for exactly that reason. Any antihistamine can still impair driving, so the patient should judge his own response before a shift.

When should a once-daily proton pump inhibitor such as omeprazole be taken for the best acid-suppressing effect?

• a.At bedtime, several hours after the last meal of the day
• b.Before the first meal of the day✓
• c.Only when heartburn is felt
• d.Immediately after the largest meal of the day

A proton pump inhibitor can only shut down pumps that are actively secreting acid, and the largest pool of active pumps is switched on by the first meal of the day, so the dose is taken before eating in the morning. Taking it right after the meal misses that window, and a PPI is a poor as-needed remedy because full acid suppression builds over several days; an antacid or an H2 blocker is what works on demand.

Ondansetron orally disintegrating tablets are dispensed to a patient who cannot keep liquids down. Which handling instruction is correct?

• a.Peel the foil back and place the tablet on the tongue; do not push it through✓
• b.Push the tablet through the foil and swallow it with a full glass of water
• c.Crush the tablet and mix it into applesauce before each dose
• d.Dissolve the tablet in water and drink the solution

The orally disintegrating tablet is deliberately fragile and crumbles if it is forced through the blister backing, so the foil is peeled open with dry hands and the tablet is laid on the tongue, where it disintegrates in seconds and is swallowed with saliva — no water needed, which is the whole point for a patient who is vomiting. Pushing it through the foil or dissolving it in a glass of water defeats that design and risks losing part of the dose.

Which direction belongs on a prescription for once-weekly oral alendronate?

• a.Take at bedtime with milk so the calcium is absorbed at the same time
• b.Take with juice at any convenient time of day
• c.Take with breakfast, then lie down to rest
• d.Take on rising with plain water and stay upright afterwards✓

Oral bisphosphonates are very poorly absorbed and can irritate or ulcerate the esophagus, so alendronate is taken first thing after getting up with a full glass of plain water, and the patient stays sitting or standing and takes nothing else by mouth for at least 30 minutes. Milk, juice, coffee and calcium supplements all block absorption, so the milk answer is doubly wrong, and lying down after the dose is the specific behavior that causes esophageal injury.

A hospital pharmacy and therapeutics committee has approved a therapeutic interchange protocol for proton pump inhibitors. What does that protocol permit?

• a.Dispensing a different drug in the same class under the approved protocol✓
• b.Dispensing the same drug from a different manufacturer at the same strength
• c.Dispensing a different drug in the same class whenever the ordered one is unavailable
• d.Dispensing an AB-rated generic of the drug the prescriber ordered

Therapeutic interchange substitutes a chemically different drug expected to give a comparable outcome — one proton pump inhibitor for another at the protocol's equivalent dose — under authority the prescribers granted in advance through the approved protocol. Making the swap because the ordered product is unavailable is the closest wrong answer: a shortage may trigger the conversation, but the authority comes from the protocol, not from the stock situation, and without a protocol the prescriber must approve each change. Dispensing an AB-rated generic or the same molecule from another manufacturer is generic substitution, which involves the identical active ingredient.

A patient cannot swallow a delayed-release capsule that contains enteric-coated pellets, and the product labeling addresses this situation. What does such labeling typically direct?

• a.Crush the pellets with the capsule shell and mix the powder into applesauce
• b.Dissolve the whole capsule in warm water until the shell breaks apart
• c.Chew the pellets thoroughly so the coating breaks before swallowing
• d.Sprinkle the intact pellets on applesauce, swallowed whole✓

In this dosage form the protection is on each individual pellet, not on the capsule shell, so the labeling allows the shell to be opened and the pellets sprinkled on a spoonful of soft food and swallowed without chewing. Crushing is the tempting answer because it also gets the drug out of the capsule, but it destroys the enteric coating and dumps the whole dose into the stomach, where acid degrades the drug and can cause irritation. Chewing does the same damage, and soaking the capsule in warm water is not a labeled administration method.

A prescription is filled for regular insulin U-500. Which statement about this product is correct?

• a.It is diluted by the pharmacy to U-100 before being dispensed
• b.It is a long-acting analog that may not be mixed with other insulins
• c.It contains five times as much insulin per mL as a U-100 product✓
• d.It contains 500 units in the vial rather than 100 units

The 'U' number always states units per milliliter, so U-500 regular insulin holds 500 units/mL — five times the concentration of U-100 — which is why it is a high-alert product dispensed with its own dedicated U-500 syringe or pen so units are never misread as volume. The idea that the number describes the total content of the vial is the classic misconception and the most tempting wrong answer. U-500 is regular human insulin, short-acting rather than a long-acting analog, and it is dispensed as supplied rather than diluted by the pharmacy.

A patient who regularly fills sildenafil brings in a new prescription for sublingual nitroglycerin, and the system fires an interaction alert. Why does this combination matter?

• a.Together they can cause severe, life-threatening hypotension✓
• b.Nitroglycerin blocks the enzyme that clears sildenafil, causing priapism
• c.Together they raise blood pressure enough to trigger a hypertensive emergency
• d.Sildenafil makes nitroglycerin lose potency in the bottle

Both drugs act on the same nitric-oxide pathway and amplify vasodilation, so a nitrate taken by someone who has recently used a PDE-5 inhibitor can drop blood pressure catastrophically; this is a contraindication rather than a caution, and the alert belongs in front of the pharmacist before the prescription goes out. The hypertensive-emergency answer inverts the mechanism, since both agents lower blood pressure rather than raise it. Sildenafil does not degrade nitroglycerin tablets, and priapism with PDE-5 inhibitors is not produced by nitrate-induced enzyme blockade.

A lyophilized vaccine is supplied with a separate diluent. How should that diluent be handled in the pharmacy?

• a.Store it in the refrigerator door so it cannot freeze at the back wall
• b.Use any manufacturer's sterile water, since vaccine diluents are interchangeable
• c.Store it at room temperature or refrigerated, and keep it out of the freezer✓
• d.Store it in the freezer with the lyophilized vaccine it belongs to

Diluents are stored as their own labeling directs — at room temperature or refrigerated — and must never be frozen, because freezing can crack the vial and damage the stabilizers the diluent carries. Freezing it alongside the vaccine is the tempting answer, since some lyophilized vaccines are themselves stored frozen, but only the vaccine goes into the freezer. Each diluent is formulated for its specific vaccine and may not be swapped for another product or for plain sterile water, and the refrigerator door is not an acceptable storage location for any vaccine component.