Drug interactions
Amobarbital + Orphenadrin
Severity: Major
Amobarbital and Orphenadrin: 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 agents depress the central nervous system, so combined use can cause excessive sedation, impaired coordination and slowed breathing. Barbiturates may also induce hepatic metabolism of other drugs, which could reduce orphenadrine exposure.
What this interaction means in plain words
Amobarbital and Orphenadrin 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; Orphenadrin belongs to Musculoskeletal.
Why it happens
Additive CNS depression; barbiturate enzyme induction may also lower orphenadrine levels.
What to do
Avoid the combination where possible, or use the lowest doses with monitoring of sedation and respiratory status. Counsel patients to avoid alcohol and driving.
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 Orphenadrin
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
Frequently asked questions
Can I take Amobarbital with Orphenadrin?
MediHelp rates the interaction as major. Amobarbital and Orphenadrin 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 agents depress the central nervous system, so combined use can cause excessive sedation, impaired coordination and slowed breathing. Barbiturates may also induce hepatic metabolism of other drugs, which could reduce orphenadrine exposure.
How serious is the interaction between Amobarbital and Orphenadrin?
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 the combination where possible, or use the lowest doses with monitoring of sedation and respiratory status. Counsel patients to avoid alcohol and driving.
What other medicines interact with Orphenadrin?
MediHelp also lists interactions of Orphenadrin with, for example, Alfentanil, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Orphenadrin page.
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