Drug interactions
Diphenoxylate-atropine + Topiramate
Severity: Moderate
Diphenoxylate-atropine and Topiramate: 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 drugs can cause drowsiness, dizziness and cognitive slowing, so combined use may increase sedation and impair alertness. Topiramate also has anticholinergic-unrelated cognitive effects that may add to those of diphenoxylate, an opioid.
What this interaction means in plain words
Diphenoxylate-atropine and Topiramate 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; Topiramate belongs to Central Nervous System.
Why it happens
Additive central nervous system depression from the opioid effect of diphenoxylate and the CNS effects of topiramate.
What to do
Counsel patients about sedation and avoid driving until response is known. Reduce the dose or stop the antidiarrheal if marked drowsiness develops.
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 Topiramate, 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 Topiramate
Frequently asked questions
Can I take Diphenoxylate-atropine with Topiramate?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Topiramate 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 drugs can cause drowsiness, dizziness and cognitive slowing, so combined use may increase sedation and impair alertness. Topiramate also has anticholinergic-unrelated cognitive effects that may add to those of diphenoxylate, an opioid.
How serious is the interaction between Diphenoxylate-atropine and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel patients about sedation and avoid driving until response is known. Reduce the dose or stop the antidiarrheal if marked drowsiness develops.
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.
