Dutasteride and tamsulosin and Warfarin interaction
Dutasteride and tamsulosin and Warfarin: the Dutasteride and tamsulosin 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 Dutasteride and tamsulosin (Jalyn) label · effective 2026-03-09
Exercise caution with concomitant use of warfarin.
Warfarin Caution should be exercised with concomitant administration of warfarin and tamsulosin-containing products, including JALYN [see Drug Interactions (7.2) , Clinical Pharmacology (12.3) ] .
Caution should be exercised with concomitant administration of warfarin and tamsulosin-containing products, including JALYN [see Warnings and Precautions (5.2) , Clinical Pharmacology (12.3) ].
Tamsulosin A definitive drug-drug interaction trial between tamsulosin hydrochloride and warfarin was not conducted.
Warfarin Dutasteride Concomitant administration of dutasteride 0.5 mg/day for 3 weeks with warfarin does not alter the steady-state pharmacokinetics of the S- or R-warfarin isomers or alter the effect of warfarin on prothrombin time [see Clinical Pharmacology (12.3) ].
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.