Tamsulosin has 7 known drug interactions based on U.S. FDA drug labeling data. 4 are classified as major interactions requiring close medical supervision. Notable interactions include combinations with Itraconazole, Nirmatrelvir And Ritonavir, Tadalafil. Patients taking Tamsulosin should inform their healthcare provider of all current medications — including over-the-counter drugs and supplements — to avoid potentially harmful combinations. Data sourced from OpenFDA and the NIH National Library of Medicine.
- Total
- 7
- Major
- 4
- Moderate
- 2
- Minor
- 1
Major (4)
- Tamsulosin + Itraconazole— Itraconazole increases tamsulosin concentrations, increasing risk of adverse reactions. Not recommended during and 2 wee…
- Tamsulosin + Nirmatrelvir And Ritonavir— Avoid concomitant use with PAXLOVID.
- Tamsulosin + Tadalafil— Clinical pharmacology studies conducted with coadministration of tadalafil with tamsulosin. Additive blood-pressure-lowe…
- Tamsulosin + Vardenafil— Alpha-blocker interaction with additive blood pressure lowering effects. Clinical pharmacology studies conducted; cautio…
Moderate (2)
- Tamsulosin + Mirabegron— Drug interaction study conducted; no dose adjustment recommended when coadministered with mirabegron.
- Tamsulosin + Vardenafil Hydrochloride— Caution is advised when vardenafil is co-administered with tamsulosin. Both are vasodilators with blood-pressure-lowerin…
Minor (1)
- Tamsulosin + Dutasteride— Administration of dutasteride in combination with tamsulosin has no effect on the steady-state pharmacokinetics of tamsu…