Drug interactions
Diphenoxylate-atropine + Neostigmine
Severity: Moderate
Diphenoxylate-atropine and Neostigmine: 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 antagonizes the muscarinic effects of neostigmine, which may reduce its therapeutic effect on gut or bladder motility. Conversely, neostigmine may partly offset the antidiarrheal and antimuscarinic effects of atropine.
What this interaction means in plain words
Diphenoxylate-atropine and Neostigmine 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.
Diphenoxylate-atropine belongs to Gastrointestinal Tract; Neostigmine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism between a muscarinic antagonist and a cholinesterase inhibitor.
What to do
Monitor for loss of effect of either drug and for cholinergic symptoms; adjust doses based on clinical response.
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 Diphenoxylate-atropine and Neostigmine, 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 Diphenoxylate-atropine
- Diphenoxylate-atropine + Isocarboxazid Contraindicated
- Diphenoxylate-atropine + Phenelzine Contraindicated
- Diphenoxylate-atropine + Tranylcypromine Contraindicated
- Alfentanil + Diphenoxylate-atropine Major
- Alvimopan + Diphenoxylate-atropine Major
- Amitriptyline + Diphenoxylate-atropine Major
Other interactions of Neostigmine
Frequently asked questions
Can I take Diphenoxylate-atropine with Neostigmine?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Neostigmine 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 antagonizes the muscarinic effects of neostigmine, which may reduce its therapeutic effect on gut or bladder motility. Conversely, neostigmine may partly offset the antidiarrheal and antimuscarinic effects of atropine.
How serious is the interaction between Diphenoxylate-atropine and Neostigmine?
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 loss of effect of either drug and for cholinergic symptoms; adjust doses based on clinical response.
What other medicines interact with Diphenoxylate-atropine?
MediHelp also lists interactions of Diphenoxylate-atropine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Diphenoxylate-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.
