Drug interactions
Pyridostigmine + Rivastigmine
Severity: Moderate
Pyridostigmine 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
Both agents inhibit cholinesterase, so their effects add together. Patients may experience bradycardia, abdominal cramping, excess secretions and, with excessive exposure, cholinergic crisis.
What this interaction means in plain words
Pyridostigmine 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.
Pyridostigmine belongs to Central Nervous System; Rivastigmine belongs to Central Nervous System.
Why it happens
Additive acetylcholinesterase inhibition.
What to do
Avoid combining unless clearly necessary. If used together, monitor heart rate, muscarinic symptoms and muscle strength and adjust doses.
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 Pyridostigmine
Frequently asked questions
Can I take Pyridostigmine with Rivastigmine?
MediHelp rates the interaction as moderate. Pyridostigmine 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. Both agents inhibit cholinesterase, so their effects add together. Patients may experience bradycardia, abdominal cramping, excess secretions and, with excessive exposure, cholinergic crisis.
How serious is the interaction between Pyridostigmine 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: Avoid combining unless clearly necessary. If used together, monitor heart rate, muscarinic symptoms and muscle strength and adjust doses.
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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