Clinical Case Story

Preventing Harm: Clinical Pharmacist Intervention in a Potential Drug–Drug Interaction

By Dr. Sanjana Ramesh · Jul 3, 2026

A 68-year-old man with atrial fibrillation on warfarin was admitted with a lower respiratory tract infection. During medication reconciliation, it was noted that clarithromycin had been prescribed. As clarithromycin can significantly increase warfarin's...

A 68-year-old man with atrial fibrillation on warfarin was admitted with a lower respiratory tract infection. During medication reconciliation, it was noted that clarithromycin had been prescribed. As clarithromycin can significantly increase warfarin's...

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