Cyclophosphamide and Warfarin interaction
Cyclophosphamide and Warfarin: the Cyclophosphamide prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Cyclophosphamide (Frindovyx) label · effective 2026-08-26
Coumarins Both increased and decreased warfarin effect have been reported in patients receiving warfarin and cyclophosphamide.
Monitor anticoagulant activity closely in patients receiving warfarin or other coumarins.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.