A patient who has taken warfarin [Coumadin] for a year begins taking carbamazepine. The nurse will anticipate an order to:

Question

Quizplus · Accepted Answer

Carbamazepine is a powerful inducer of hepatic drug-metabolizing enzymes and can accelerate warfarin degradation. The warfarin dose should be increased if the patient begins taking carbamazepine. Decreasing the dose of carbamazepine is not indicated. It is not necessary to perform more frequent aPTT monitoring or to add extra vitamin K.

A Patient Who Has Taken Warfarin [Coumadin] for a Year