Drug interactions
Clonazepam + Saquinavir
Severity: Moderate
Clonazepam and Saquinavir: moderate 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, which is given with ritonavir, may increase clonazepam exposure and cause prolonged sedation or respiratory depression. The risk is greater at higher benzodiazepine doses.
What this interaction means in plain words
Clonazepam and Saquinavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Saquinavir and its ritonavir booster inhibit CYP3A4, reducing clonazepam clearance.
What to do
Monitor for oversedation and reduce the clonazepam dose when starting the antiretroviral regimen. Consider lorazepam or another benzodiazepine that is not CYP3A4 dependent if sedation is troublesome.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Clonazepam and Saquinavir, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Clonazepam
- Calcium / magnesium / potassium / sodium oxybates + Clonazepam Contraindicated
- Clonazepam + Sodium oxybate Contraindicated
- Alfentanil + Clonazepam Major
- Alprazolam + Clonazepam Major
- Amobarbital + Clonazepam Major
- Belladonna and opium + Clonazepam Major
Frequently asked questions
Can I take Clonazepam with Saquinavir?
MediHelp rates the interaction as moderate. Clonazepam and Saquinavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Saquinavir, which is given with ritonavir, may increase clonazepam exposure and cause prolonged sedation or respiratory depression. The risk is greater at higher benzodiazepine doses.
How serious is the interaction between Clonazepam and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for oversedation and reduce the clonazepam dose when starting the antiretroviral regimen. Consider lorazepam or another benzodiazepine that is not CYP3A4 dependent if sedation is troublesome.
What other medicines interact with Clonazepam?
MediHelp also lists interactions of Clonazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Sodium oxybate, Alfentanil. The full list is on the Clonazepam page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
