The nurse is providing drug teaching for a patient who is to be discharged taking dofetilide (Tikosyn). What drug will the nurse teach the patient to avoid due to a drug-drug interaction?
A) Cimetidine
B) Furosemide
C) Acetaminophen
D) Antacids
A
Feedback:
There is an increased risk of serious adverse effects if dofetilide is combined with ketoconazole, cimetidine, or verapamil, so these combinations should be avoided. There is no known increased risk associated with furosemide, acetaminophen, or antacids but other specific drug–drug interaction are reported, so it is important to check a current drug handbook before administering these medications.
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