Drug interactions
Benzphetamine + Orphenadrin
Severity: Minor
Benzphetamine and Orphenadrin: minor 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
Orphenadrine is sedating and anticholinergic, whereas benzphetamine is a sympathomimetic anorectic. The net effect on alertness is unpredictable, and the anticholinergic and sympathomimetic actions could additively raise heart rate.
What this interaction means in plain words
Benzphetamine and Orphenadrin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opposing CNS effects and possible additive tachycardic effects; no well-established mechanism.
What to do
No routine adjustment is needed. Monitor heart rate and blood pressure in patients with cardiovascular disease.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Orphenadrin
Frequently asked questions
Can I take Benzphetamine with Orphenadrin?
MediHelp rates the interaction as minor. Benzphetamine and Orphenadrin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Orphenadrine is sedating and anticholinergic, whereas benzphetamine is a sympathomimetic anorectic. The net effect on alertness is unpredictable, and the anticholinergic and sympathomimetic actions could additively raise heart rate.
How serious is the interaction between Benzphetamine and Orphenadrin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine adjustment is needed. Monitor heart rate and blood pressure in patients with cardiovascular disease.
What other medicines interact with Orphenadrin?
MediHelp also lists interactions of Orphenadrin with, for example, Alfentanil, Amobarbital, Benzhydrocodone / acetaminophen. The full list is on the Orphenadrin page.
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