Drug interactions
Carbachol + Rivastigmine
Severity: Moderate
Carbachol and Rivastigmine: 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
Carbachol is a direct muscarinic and nicotinic agonist that is also resistant to cholinesterase breakdown. Combined with rivastigmine, cholinergic effects may be amplified. Systemic effects are only likely with oral or injected carbachol, since ophthalmic use has little systemic exposure.
What this interaction means in plain words
Carbachol and Rivastigmine 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.
Carbachol belongs to Miscellaneous; Rivastigmine belongs to Central Nervous System.
Why it happens
Additive cholinergic stimulation from a direct agonist and a cholinesterase inhibitor.
What to do
Monitor for bradycardia, bronchospasm, sweating, salivation and gastrointestinal cramping. Reduce the dose of one agent if cholinergic excess develops.
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 Rivastigmine
Other interactions of Carbachol
- Atropine + Carbachol Moderate
- Bethanechol + Carbachol Moderate
- Carbachol + Darifenacin Moderate
- Carbachol + Dicyclomine Moderate
- Carbachol + Donepezil Moderate
- Carbachol + Flavoxate Moderate
Frequently asked questions
Can I take Carbachol with Rivastigmine?
MediHelp rates the interaction as moderate. Carbachol and Rivastigmine 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. Carbachol is a direct muscarinic and nicotinic agonist that is also resistant to cholinesterase breakdown. Combined with rivastigmine, cholinergic effects may be amplified. Systemic effects are only likely with oral or injected carbachol, since ophthalmic use has little systemic exposure.
How serious is the interaction between Carbachol and Rivastigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for bradycardia, bronchospasm, sweating, salivation and gastrointestinal cramping. Reduce the dose of one agent if cholinergic excess develops.
What other medicines interact with Rivastigmine?
MediHelp also lists interactions of Rivastigmine with, for example, Donepezil, Galantamine, Memantine-donepezil. The full list is on the Rivastigmine page.
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