Alfuzosin and Fosamprenavir interaction
Alfuzosin and Fosamprenavir: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Alfuzosin (Uroxatral) label · effective 2024-12-05
…(Childs-Pugh categories B and C), since alfuzosin blood levels are increased in these patients [see Use in Specific Populations (8.7) and Clinical Pharmacology (12.3) ]. with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, and ritonavir, since alfuzosin blood levels are increased [see Drug Interactions (7.1) and Clinical Pharmacology (12.3) ] . in…
Co-administration with potent CYP3A4 inhibitors (e.g. ketoconazole, itraconazole, ritonavir) ( 4 , 5.4 , 7.1 , 12.3 )
Drug-Drug Interactions Potent CYP3A4 Inhibitors : UROXATRAL is contraindicated for use with potent CYP3A4 inhibitors (e.g. ketoconazole, itraconazole, ritonavir) since alfuzosin blood levels are increased [see Contraindications (4) , Drug Interactions (7.1) and Clinical Pharmacology (12.3) ].
CYP3A4 Inhibitors UROXATRAL is contraindicated for use with potent CYP3A4 inhibitors such as ketoconazole, itraconazole, or ritonavir, since alfuzosin blood levels are increased [see Contraindications (4) , Warnings and Precautions (5.4) and Clinical Pharmacology (12.3) ] .
From the Fosamprenavir (Fosamprenavir Calcium) label · effective 2026-06-30
Fosamprenavir calcium is contraindicated when coadministered with the following drugs: Alpha 1-adrenoreceptor antagonist: Alfuzosin Antiarrhythmics: Flecainide (with ritonavir ), propafenone (with ritonavir ) Antimycobacterial: Rifampin Antipsychotic: Lurasidone (with ritonavir ), pimozide Ergot derivatives: Dihydroergotamine, ergonovine, ergotamine, methylergonovine…
Other Agents Alpha 1-adrenoreceptor antagonist: Alfuzosin ↑Alfuzosin Coadministration is contraindicated due to potential hypotension [see Contraindications (4)] .
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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.