Drug interactions
Nelfinavir + Pantoprazole
Severity: Major
Nelfinavir and Pantoprazole: 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
Pantoprazole raises gastric pH, which can reduce nelfinavir absorption, and may also affect formation of its active metabolite. This may lower antiviral exposure, risking virologic failure and resistance.
What this interaction means in plain words
Nelfinavir and Pantoprazole 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.
Nelfinavir belongs to Anti Virals; Pantoprazole belongs to Gastrointestinal Tract.
Why it happens
Reduced pH-dependent nelfinavir absorption, with possible CYP2C19 inhibition reducing active metabolite formation.
What to do
Avoid coadministration; use an H2 blocker or antacid with appropriate spacing if acid suppression is needed. Monitor HIV viral load if unavoidable.
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 Pantoprazole
- Pantoprazole + Rilpivirine Contraindicated
- Acalabrutinib + Pantoprazole Major
- Atazanavir + Pantoprazole Major
- Dacomitinib + Pantoprazole Major
- Dasatinib + Pantoprazole Major
- Erlotinib + Pantoprazole Major
Other interactions of Nelfinavir
- Alfuzosin + Nelfinavir Contraindicated
- Avanafil + Nelfinavir Contraindicated
- Dronedarone + Nelfinavir Contraindicated
- Eletriptan + Nelfinavir Contraindicated
- Ergotamine + Nelfinavir Contraindicated
- Flibanserin + Nelfinavir Contraindicated
Frequently asked questions
Can I take Nelfinavir with Pantoprazole?
MediHelp rates the interaction as major. Nelfinavir and Pantoprazole 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. Pantoprazole raises gastric pH, which can reduce nelfinavir absorption, and may also affect formation of its active metabolite. This may lower antiviral exposure, risking virologic failure and resistance.
How serious is the interaction between Nelfinavir and Pantoprazole?
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 coadministration; use an H2 blocker or antacid with appropriate spacing if acid suppression is needed. Monitor HIV viral load if unavoidable.
What other medicines interact with Pantoprazole?
MediHelp also lists interactions of Pantoprazole with, for example, Rilpivirine, Acalabrutinib, Atazanavir. The full list is on the Pantoprazole page.
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