Atazanavir and Omeprazole interaction
Atazanavir and Omeprazole: 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 Atazanavir (REYATAZ) label · effective 2024-12-05
In HIV-treatment-experienced adult patients: Coadministration of REYATAZ with PPIs is not recommended.
Reduced plasma concentrations of atazanavir are expected if proton-pump inhibitors, antacids, buffered medications, or H 2 -receptor antagonists are administered with REYATAZ [see Dosage and Administration ( 2.3 , 2.4 , 2.5 and 2.6) ] .
Proton-pump inhibitors: omeprazole ↓ atazanavir Coadministration of REYATAZ with or without ritonavir and omeprazole may result in loss of virologic response and development of resistance.
In HIV-treatment-naive adult patients: The proton-pump inhibitor (PPI) dose should not exceed a dose comparable to omeprazole 20 mg and must be taken approximately 12 hours prior to the REYATAZ 300 mg with ritonavir 100 mg dose.
From the Omeprazole (Prilosec) label · effective 2024-03-19
Atazanavir : Avoid concomitant use with PRILOSEC.
• Decreased exposure of some antiretroviral drugs (e.g., rilpivirine, atazanavir and nelfinavir) when used concomitantly with omeprazole may reduce antiviral effect and promote the development of drug resistance [see Clinical Pharmacology ( 12.3 )].
• Increased exposure of other antiretroviral drugs (e.g., saquinavir) when used concomitantly with omeprazole may increase toxicity [see Clinical Pharmacology ( 12.3 )].
CYP2C19 or CYP3A4 Inhibitors Clinical Impact: Increased exposure of omeprazole [see Clinical Pharmacology ( 12.3 )] .
See prescribing information for atazanavir for dosing information.
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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.