Drug interactions
Amobarbital + Methohexital
Severity: Major
Amobarbital and Methohexital: 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 barbiturates with CNS depressant effects, so combined use produces additive sedation, hypotension and respiratory depression. Risk is greater with anesthetic doses of methohexital.
What this interaction means in plain words
Amobarbital and Methohexital 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.
Amobarbital belongs to Central Nervous System; Methohexital belongs to Central Nervous System.
Why it happens
Additive GABA-A receptor potentiation causing CNS and respiratory depression.
What to do
Avoid concurrent use unless necessary. If combined, reduce doses and monitor respiratory function, oxygen saturation and blood pressure continuously.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Amobarbital and Methohexital, 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 14 days on the web. No card needed.
Other interactions of Amobarbital
- Amobarbital + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Amobarbital + Doravirine Contraindicated
- Amobarbital + Elbasvir / grazoprevir Contraindicated
- Amobarbital + Isavuconazonium Contraindicated
- Amobarbital + Isocarboxazid Contraindicated
- Amobarbital + Lonafarnib Contraindicated
Other interactions of Methohexital
Frequently asked questions
Can I take Amobarbital with Methohexital?
MediHelp rates the interaction as major. Amobarbital and Methohexital 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 barbiturates with CNS depressant effects, so combined use produces additive sedation, hypotension and respiratory depression. Risk is greater with anesthetic doses of methohexital.
How serious is the interaction between Amobarbital and Methohexital?
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 unless necessary. If combined, reduce doses and monitor respiratory function, oxygen saturation and blood pressure continuously.
What other medicines interact with Amobarbital?
MediHelp also lists interactions of Amobarbital with, for example, Calcium / magnesium / potassium / sodium oxybates, Doravirine, Elbasvir / grazoprevir. The full list is on the Amobarbital 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.
