Does Itraconazole Interact With Tamsulosin?

The label advises avoiding this combination or using it only under close medical supervision. Talk to your prescriber or pharmacist before combining them.

Interactions like this one can happen when two medicines have overlapping effects, or when one changes how the other is absorbed, broken down, or cleared from the body. Itraconazole is a azole antifungal (strong cyp3a4 inhibitor) and Tamsulosin is a alpha-1 blocker (bph); together they are documented as a major interaction. How much this matters depends on your dose, your other medications, and your overall health.

If you have been prescribed both Itraconazole and Tamsulosin, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.

Table 1:Drug Interactions with Itraconazole that Affect Concomitant Drug Concentrations Examples of Concomitant Drugs Within Class Prevention or Management Drug Interactions with Itraconazole that Increase Concomitant Drug Concentrations and May Increase Risk of Adverse Reactions Associated with the Concomitant Drug Alpha Blockers Alfuzosin Silodosin Tamsulosin Not recommended during and 2 weeks after itraconazole treatment.

Source: FDA structured product labeling (set_id 23126370-8d6a-4027-bd8f-860e2776ba3a).