Tamsulosin and Warfarin interaction
Tamsulosin and Warfarin: the Tamsulosin prescribing label describe 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 Tamsulosin (Tamsulosin Hydrochloride) label · effective 2026-08-12
• Exercise caution with concomitant administration of warfarin ( 5.2 , 7.4 , 12.3 )
Caution should be exercised with concomitant administration of warfarin and tamsulosin hydrochloride capsules [see Drug Interactions ( 7.4 ) and Clinical Pharmacology ( 12.3 )].
Caution should be exercised with concomitant administration of warfarin and tamsulosin hydrochloride capsules [see Warnings and Precautions ( 5.2 ) and Clinical Pharmacology ( 12.3 )] .
Warfarin A definitive drug-drug interaction study between tamsulosin hydrochloride and warfarin was not conducted.
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.