Alfuzosin and Itraconazole Interaction
Drug interaction information between Alfuzosin and Itraconazole.
Alfuzosin and Itraconazole have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Alfuzosin and Itraconazole. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Itraconazole slows down the breakdown of alfuzosin in your body, which can lead to an unsafe buildup of the medication. This increases your risk of having a bad reaction to the alfuzosin.
What To Do
Do not take these medicines together or for two weeks after your itraconazole treatment has ended.
Alfuzosin Also Interacts With
- Ketoconazole major
- Darunavir major
- Nirmatrelvir/Ritonavir major
- Tadalafil minor
Itraconazole Also Interacts With
- Isavuconazonium major
- Lurasidone major
- Pimozide major
- Methadone major
- Midazolam major
Frequently Asked Questions
Can I take Alfuzosin and Itraconazole together?
This is a moderate interaction. Do not take these medicines together or for two weeks after your itraconazole treatment has ended.
How serious is the interaction between Alfuzosin and Itraconazole?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Alfuzosin and Itraconazole interact?
Itraconazole slows down the breakdown of alfuzosin in your body, which can lead to an unsafe buildup of the medication. This increases your risk of having a bad reaction to the alfuzosin.
Understanding the Alfuzosin and Itraconazole Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Alfuzosin belongs to the Alpha-1 Blocker (BPH) class and Itraconazole belongs to the Azole Antifungal class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Itraconazole slows down the breakdown of alfuzosin in your body, which can lead to an unsafe buildup of the medication. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Alfuzosin has 5 total documented interactions on file in this dataset, and Itraconazole has 116. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Do not take these medicines together or for two weeks after your itraconazole treatment has ended. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Alfuzosin or Itraconazole based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.