Drug interactions
Atazanavir + Dexlansoprazole
Severity: Major
Atazanavir and Dexlansoprazole: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Atazanavir absorption depends on gastric acidity, and dexlansoprazole can markedly lower atazanavir concentrations. This risks loss of virologic suppression and resistance.
What this interaction means in plain words
Atazanavir and Dexlansoprazole can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Atazanavir belongs to Anti Virals; Dexlansoprazole belongs to Gastrointestinal Tract.
Why it happens
Higher gastric pH decreases atazanavir solubility and absorption.
What to do
Avoid PPIs in treatment-experienced patients on atazanavir. In treatment-naive patients follow labeling for a low PPI dose about 12 hours before boosted atazanavir, or choose another antiretroviral.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Dexlansoprazole
- Dexlansoprazole + Mavacamten Contraindicated
- Dexlansoprazole + Rilpivirine Contraindicated
- Acalabrutinib + Dexlansoprazole Major
- Dacomitinib + Dexlansoprazole Major
- Dasatinib + Dexlansoprazole Major
- Dexlansoprazole + Erlotinib Major
Other interactions of Atazanavir
- Alfuzosin + Atazanavir Contraindicated
- Atazanavir + Avanafil Contraindicated
- Atazanavir + Dronedarone Contraindicated
- Atazanavir + Eletriptan Contraindicated
- Atazanavir + Eplerenone Contraindicated
- Atazanavir + Ergotamine Contraindicated
Frequently asked questions
Can I take Atazanavir with Dexlansoprazole?
MediHelp rates the interaction as major. Atazanavir and Dexlansoprazole can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Atazanavir absorption depends on gastric acidity, and dexlansoprazole can markedly lower atazanavir concentrations. This risks loss of virologic suppression and resistance.
How serious is the interaction between Atazanavir and Dexlansoprazole?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid PPIs in treatment-experienced patients on atazanavir. In treatment-naive patients follow labeling for a low PPI dose about 12 hours before boosted atazanavir, or choose another antiretroviral.
What other medicines interact with Dexlansoprazole?
MediHelp also lists interactions of Dexlansoprazole with, for example, Mavacamten, Rilpivirine, Acalabrutinib. The full list is on the Dexlansoprazole page.
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