Drug interactions
Glycopyrrolate + Pyridostigmine
Severity: Moderate
Glycopyrrolate and Pyridostigmine: 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
Glycopyrrolate blocks the muscarinic effects of pyridostigmine and is often deliberately used to limit its gastrointestinal and secretory adverse effects. This can mask early signs of cholinergic excess, and glycopyrrolate does not counter nicotinic effects.
What this interaction means in plain words
Glycopyrrolate and Pyridostigmine 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.
Glycopyrrolate belongs to Respiratory; Pyridostigmine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism: muscarinic blockade opposes increased acetylcholine from cholinesterase inhibition.
What to do
Use the lowest glycopyrrolate dose that controls muscarinic adverse effects. Monitor muscle strength for signs of cholinergic crisis that may be masked.
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 Pyridostigmine
Other interactions of Glycopyrrolate
- Glycopyrrolate + Potassium chloride Major
- Amitriptyline + Glycopyrrolate Moderate
- Atropine + Glycopyrrolate Moderate
- Bethanechol + Glycopyrrolate Moderate
- Chlorpromazine + Glycopyrrolate Moderate
- Clomipramine + Glycopyrrolate Moderate
Frequently asked questions
Can I take Glycopyrrolate with Pyridostigmine?
MediHelp rates the interaction as moderate. Glycopyrrolate and Pyridostigmine 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. Glycopyrrolate blocks the muscarinic effects of pyridostigmine and is often deliberately used to limit its gastrointestinal and secretory adverse effects. This can mask early signs of cholinergic excess, and glycopyrrolate does not counter nicotinic effects.
How serious is the interaction between Glycopyrrolate and Pyridostigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest glycopyrrolate dose that controls muscarinic adverse effects. Monitor muscle strength for signs of cholinergic crisis that may be masked.
What other medicines interact with Pyridostigmine?
MediHelp also lists interactions of Pyridostigmine with, for example, Echothiophate iodide, Huperzine a, Neostigmine. The full list is on the Pyridostigmine page.
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