When reviewing the medication orders for a
patient who is taking penicillin, the nurse notes that the patient is also taking the oral anticoagulant warfarin (Coumadin). What possible effect may occur as the result of an interaction between these drugs?
a. The penicillin will cause an enhanced anticoagulant effect of the warfarin.
b. The penicillin will cause the anticoagulant effect of the warfarin to decrease.
c. The warfarin will reduce the anti-infective action of the penicillin.
d. The warfarin will increase the effectiveness of the penicillin.
ANS: A
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