Drug interactions
Galantamine + Phenobarbital
Severity: Minor
Galantamine and Phenobarbital: 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
Phenobarbital is an established CYP3A4 inducer and may reduce galantamine exposure during chronic therapy. This could diminish the cognitive benefit of galantamine.
What this interaction means in plain words
Galantamine and Phenobarbital 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
Induction of CYP3A4 by phenobarbital increases galantamine metabolism.
What to do
Reassess clinical response and titrate galantamine within the approved range if effect is lost; recheck when phenobarbital is stopped.
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 Galantamine
- Galantamine + Memantine-donepezil Major
- Galantamine + Physostigmine Major
- Galantamine + Ponesimod Major
- Galantamine + Rivastigmine Major
- Amifampridine + Galantamine Moderate
- Amiodarone + Galantamine Moderate
Frequently asked questions
Can I take Galantamine with Phenobarbital?
MediHelp rates the interaction as minor. Galantamine and Phenobarbital have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phenobarbital is an established CYP3A4 inducer and may reduce galantamine exposure during chronic therapy. This could diminish the cognitive benefit of galantamine.
How serious is the interaction between Galantamine and Phenobarbital?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Reassess clinical response and titrate galantamine within the approved range if effect is lost; recheck when phenobarbital is stopped.
What other medicines interact with Galantamine?
MediHelp also lists interactions of Galantamine with, for example, Memantine-donepezil, Physostigmine, Ponesimod. The full list is on the Galantamine page.
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