Drug interactions
Galantamine + Rifabutin
Severity: Minor
Galantamine and Rifabutin: 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
Rifabutin is an inducer of CYP3A4 and may lower galantamine exposure, which is partly metabolized by CYP3A4 and CYP2D6. The effect is likely modest because rifabutin is a weaker inducer than rifampicin, but it may reduce cognitive benefit.
What this interaction means in plain words
Galantamine and Rifabutin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Galantamine belongs to Central Nervous System; Rifabutin belongs to Anti Bacterial.
Why it happens
Rifabutin induces hepatic and intestinal CYP3A4, increasing galantamine clearance.
What to do
Monitor clinical response to galantamine and consider titrating the dose upward within the labeled range if benefit is lost during rifabutin therapy.
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
Other interactions of Rifabutin
- Cabotegravir + Rifabutin Contraindicated
- Lorlatinib + Rifabutin Contraindicated
- Rifabutin + Voriconazole Contraindicated
- Apixaban + Rifabutin Major
- Axitinib + Rifabutin Major
- Brexpiprazole + Rifabutin Major
Frequently asked questions
Can I take Galantamine with Rifabutin?
MediHelp rates the interaction as minor. Galantamine and Rifabutin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rifabutin is an inducer of CYP3A4 and may lower galantamine exposure, which is partly metabolized by CYP3A4 and CYP2D6. The effect is likely modest because rifabutin is a weaker inducer than rifampicin, but it may reduce cognitive benefit.
How serious is the interaction between Galantamine and Rifabutin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response to galantamine and consider titrating the dose upward within the labeled range if benefit is lost during rifabutin therapy.
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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