Drug interactions
Oxazepam + Quazepam
Severity: Major
Oxazepam and Quazepam: 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
Both are benzodiazepines, so taking them together duplicates therapy and increases sedation, psychomotor impairment and respiratory depression. Quazepam has long-acting active metabolites, which prolongs the effect.
What this interaction means in plain words
Oxazepam and Quazepam 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
Additive GABA-A receptor potentiation.
What to do
Avoid concurrent use of two benzodiazepines and consolidate to one agent. If a switch is needed, taper and 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 Oxazepam
- Calcium / magnesium / potassium / sodium oxybates + Oxazepam Contraindicated
- Oxazepam + Sodium oxybate Contraindicated
- Alfentanil + Oxazepam Major
- Amobarbital + Oxazepam Major
- Baclofen + Oxazepam Major
- Belladonna and opium + Oxazepam Major
Frequently asked questions
Can I take Oxazepam with Quazepam?
MediHelp rates the interaction as major. Oxazepam and Quazepam 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. Both are benzodiazepines, so taking them together duplicates therapy and increases sedation, psychomotor impairment and respiratory depression. Quazepam has long-acting active metabolites, which prolongs the effect.
How serious is the interaction between Oxazepam and Quazepam?
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 concurrent use of two benzodiazepines and consolidate to one agent. If a switch is needed, taper and monitor for oversedation.
What other medicines interact with Oxazepam?
MediHelp also lists interactions of Oxazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Sodium oxybate, Alfentanil. The full list is on the Oxazepam page.
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