Drug interactions
Pyridostigmine + Solifenacin
Severity: Moderate
Pyridostigmine and Solifenacin: 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
Solifenacin blocks muscarinic receptors while pyridostigmine increases acetylcholine by inhibiting its breakdown, so the two have opposing effects. Solifenacin may reduce the muscarinic benefits of pyridostigmine, and it can mask the cholinergic adverse effects that would otherwise signal overdose.
What this interaction means in plain words
Pyridostigmine and Solifenacin 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; Solifenacin belongs to Genitourinary.
Why it happens
Pharmacodynamic antagonism between an antimuscarinic and a cholinesterase inhibitor.
What to do
Monitor myasthenia symptoms and bladder function after the combination is started. Adjust the pyridostigmine dose according to response and avoid relying on muscarinic side effects as a sign of overdose.
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 Solifenacin
Other interactions of Pyridostigmine
Frequently asked questions
Can I take Pyridostigmine with Solifenacin?
MediHelp rates the interaction as moderate. Pyridostigmine and Solifenacin 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. Solifenacin blocks muscarinic receptors while pyridostigmine increases acetylcholine by inhibiting its breakdown, so the two have opposing effects. Solifenacin may reduce the muscarinic benefits of pyridostigmine, and it can mask the cholinergic adverse effects that would otherwise signal overdose.
How serious is the interaction between Pyridostigmine and Solifenacin?
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 myasthenia symptoms and bladder function after the combination is started. Adjust the pyridostigmine dose according to response and avoid relying on muscarinic side effects as a sign of overdose.
What other medicines interact with Solifenacin?
MediHelp also lists interactions of Solifenacin with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Solifenacin page.
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