Drug interactions
Diazepam + Quinupristin / dalfopristin
Severity: Moderate
Diazepam and Quinupristin / dalfopristin: 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
Quinupristin/dalfopristin inhibits CYP3A4 and may raise diazepam concentrations, increasing sedation. The effect is usually modest because diazepam is also cleared by CYP2C19.
What this interaction means in plain words
Diazepam and Quinupristin / dalfopristin 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
Inhibition of CYP3A4-mediated diazepam metabolism, reducing clearance.
What to do
Monitor for increased sedation and psychomotor impairment during therapy and reduce the diazepam dose if needed.
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 Diazepam and Quinupristin / dalfopristin, 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 Diazepam
Frequently asked questions
Can I take Diazepam with Quinupristin / dalfopristin?
MediHelp rates the interaction as moderate. Diazepam and Quinupristin / dalfopristin 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. Quinupristin/dalfopristin inhibits CYP3A4 and may raise diazepam concentrations, increasing sedation. The effect is usually modest because diazepam is also cleared by CYP2C19.
How serious is the interaction between Diazepam and Quinupristin / dalfopristin?
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 increased sedation and psychomotor impairment during therapy and reduce the diazepam dose if needed.
What other medicines interact with Diazepam?
MediHelp also lists interactions of Diazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Alfentanil, Alprazolam. The full list is on the Diazepam 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.
