Drug interactions
Alprazolam + Methadone
Severity: Major
Alprazolam and Methadone: 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
Opioids combined with benzodiazepines can cause profound sedation, respiratory depression, coma and death, and this is a boxed warning for both classes. Risk is notable in methadone patients, in whom benzodiazepine misuse is common.
What this interaction means in plain words
Alprazolam and Methadone 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.
Alprazolam belongs to Central Nervous System; Methadone belongs to Musculoskeletal.
Why it happens
Additive CNS and respiratory depression via mu-opioid and GABA-A mechanisms; alprazolam metabolism by CYP3A4 may also be affected.
What to do
Avoid combination when possible; if required use the lowest doses and shortest duration, monitor respiratory status and counsel patients and caregivers on overdose signs. Consider naloxone availability.
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 Methadone
- Alvimopan + Methadone Contraindicated
Other interactions of Alprazolam
- Alprazolam + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Alprazolam + Itraconazole Contraindicated
- Alprazolam + Ketoconazole Contraindicated
- Alprazolam + Levoketoconazole Contraindicated
- Alprazolam + Sodium oxybate Contraindicated
- Alfentanil + Alprazolam Major
Frequently asked questions
Can I take Alprazolam with Methadone?
MediHelp rates the interaction as major. Alprazolam and Methadone 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. Opioids combined with benzodiazepines can cause profound sedation, respiratory depression, coma and death, and this is a boxed warning for both classes. Risk is notable in methadone patients, in whom benzodiazepine misuse is common.
How serious is the interaction between Alprazolam and Methadone?
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 combination when possible; if required use the lowest doses and shortest duration, monitor respiratory status and counsel patients and caregivers on overdose signs. Consider naloxone availability.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan. The full list is on the Methadone page.
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