Drug interactions
Chlordiazepoxide + Saquinavir
Severity: Major
Chlordiazepoxide and Saquinavir: 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
Saquinavir, given with ritonavir, inhibits CYP3A4 and can increase chlordiazepoxide levels, causing prolonged sedation and respiratory depression.
What this interaction means in plain words
Chlordiazepoxide and Saquinavir 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.
Why it happens
Inhibition of CYP3A4-mediated metabolism of chlordiazepoxide.
What to do
Prefer lorazepam or another non-oxidatively metabolised benzodiazepine, or lower the chlordiazepoxide dose. Monitor for oversedation.
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 Chlordiazepoxide
Frequently asked questions
Can I take Chlordiazepoxide with Saquinavir?
MediHelp rates the interaction as major. Chlordiazepoxide and Saquinavir 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. Saquinavir, given with ritonavir, inhibits CYP3A4 and can increase chlordiazepoxide levels, causing prolonged sedation and respiratory depression.
How serious is the interaction between Chlordiazepoxide and Saquinavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer lorazepam or another non-oxidatively metabolised benzodiazepine, or lower the chlordiazepoxide dose. Monitor for oversedation.
What other medicines interact with Chlordiazepoxide?
MediHelp also lists interactions of Chlordiazepoxide with, for example, Alfentanil, Alprazolam, Amobarbital. The full list is on the Chlordiazepoxide page.
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