Drug interactions
Galantamine + Physostigmine
Severity: Major
Galantamine and Physostigmine: 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 drugs inhibit cholinesterase, so combined use produces additive cholinergic stimulation. This may cause bradycardia, bronchospasm, excessive secretions, vomiting and seizures.
What this interaction means in plain words
Galantamine and Physostigmine 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.
Why it happens
Additive acetylcholinesterase inhibition.
What to do
Avoid concurrent use unless physostigmine is needed for anticholinergic toxicity, with continuous monitoring of heart rate and respiration and atropine available.
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 Galantamine
- Galantamine + Memantine-donepezil Major
- Galantamine + Ponesimod Major
- Galantamine + Rivastigmine Major
- Amifampridine + Galantamine Moderate
- Amiodarone + Galantamine Moderate
- Amitriptyline + Galantamine Moderate
Frequently asked questions
Can I take Galantamine with Physostigmine?
MediHelp rates the interaction as major. Galantamine and Physostigmine 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 drugs inhibit cholinesterase, so combined use produces additive cholinergic stimulation. This may cause bradycardia, bronchospasm, excessive secretions, vomiting and seizures.
How serious is the interaction between Galantamine and Physostigmine?
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 physostigmine is needed for anticholinergic toxicity, with continuous monitoring of heart rate and respiration and atropine available.
What other medicines interact with Galantamine?
MediHelp also lists interactions of Galantamine with, for example, Memantine-donepezil, Ponesimod, Rivastigmine. The full list is on the Galantamine page.
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