Drug interactions
Atropine + Pyridostigmine
Severity: Moderate
Atropine 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
Atropine blocks the muscarinic adverse effects of pyridostigmine, including abdominal cramps, salivation and bradycardia, but does not affect nicotinic effects. This can mask early signs of cholinergic overdose and may reduce gastrointestinal benefit. It is also an antidote in cholinergic toxicity.
What this interaction means in plain words
Atropine 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.
Atropine belongs to Miscellaneous; Pyridostigmine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism: cholinesterase inhibition versus muscarinic receptor blockade.
What to do
If atropine is used to control pyridostigmine side effects, monitor for muscle weakness suggesting cholinergic crisis, which atropine will not prevent. Use the lowest effective atropine dose.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Atropine and Pyridostigmine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Atropine
- Atropine + Eluxadoline Major
- Atropine + Henbane Major
- Atropine + Pramlintide Major
- Abobotulinumtoxina + Atropine Moderate
- Aclidinium + Atropine Moderate
- Amantadine + Atropine Moderate
Other interactions of Pyridostigmine
Frequently asked questions
Can I take Atropine with Pyridostigmine?
MediHelp rates the interaction as moderate. Atropine 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. Atropine blocks the muscarinic adverse effects of pyridostigmine, including abdominal cramps, salivation and bradycardia, but does not affect nicotinic effects. This can mask early signs of cholinergic overdose and may reduce gastrointestinal benefit. It is also an antidote in cholinergic toxicity.
How serious is the interaction between Atropine 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: If atropine is used to control pyridostigmine side effects, monitor for muscle weakness suggesting cholinergic crisis, which atropine will not prevent. Use the lowest effective atropine dose.
What other medicines interact with Atropine?
MediHelp also lists interactions of Atropine with, for example, Eluxadoline, Henbane, Pramlintide. The full list is on the Atropine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
