Drug interactions
Galantamine + Neostigmine
Severity: Moderate
Galantamine and Neostigmine: moderate 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 acetylcholinesterase, so combining them can amplify cholinergic effects such as bradycardia, nausea, vomiting, diarrhea, salivation and bronchospasm. The risk of cholinergic toxicity is greater at higher doses or in patients with cardiac conduction disease or asthma.
What this interaction means in plain words
Galantamine and Neostigmine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Galantamine belongs to Central Nervous System; Neostigmine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic cholinesterase inhibition leading to increased acetylcholine at muscarinic and nicotinic receptors.
What to do
Avoid routine duplication of cholinesterase inhibitors; if used together, monitor heart rate and for GI and respiratory cholinergic symptoms and reduce the dose if they appear.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Neostigmine
Frequently asked questions
Can I take Galantamine with Neostigmine?
MediHelp rates the interaction as moderate. Galantamine and Neostigmine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both drugs inhibit acetylcholinesterase, so combining them can amplify cholinergic effects such as bradycardia, nausea, vomiting, diarrhea, salivation and bronchospasm. The risk of cholinergic toxicity is greater at higher doses or in patients with cardiac conduction disease or asthma.
How serious is the interaction between Galantamine and Neostigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid routine duplication of cholinesterase inhibitors; if used together, monitor heart rate and for GI and respiratory cholinergic symptoms and reduce the dose if they appear.
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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