PharmacologyQuestion 42 of 100

Drug interaction: a resident on warfarin is also given a new medication. The aide should be especially alert because interactions may:

a.Increase or decrease warfarin's blood-thinning effect
b.Change the resident's eye color
c.Have no possible effect
d.Only matter for injectable drugs

Explanation

Many drugs and even foods high in vitamin K interact with warfarin, either raising bleeding risk or reducing effectiveness. New medications should prompt the aide to watch closely and ensure the nurse is aware of the full drug list.

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