Dutasteride and Tamsulosin interaction
Dutasteride and Tamsulosin: the Dutasteride prescribing label mentions this combination without an instruction to avoid it or change the dose.
Mentioned, no instruction to avoid. Worth knowing; rarely a reason to change anything on its own.
What the FDA labels say
From the Dutasteride label · effective 2026-01-13
Coadministration of dutasteride and tamsulosin resulted in similar changes to serum PSA as dutasteride monotherapy.
The effect of administration of tamsulosin or terazosin on dutasteride pharmacokinetic parameters has not been evaluated.
Alpha-adrenergic Antagonists The administration of dutasteride capsules in combination with tamsulosin or terazosin has no effect on the steady-state pharmacokinetics of either alpha-adrenergic antagonist.
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.