Drug interactions
Diphenoxylate-atropine + Fenfluramine
Severity: Minor
Diphenoxylate-atropine and Fenfluramine: minor 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
Fenfluramine can cause somnolence and lethargy, so additive sedation is more likely than the opposing effect suggested. Fenfluramine also can reduce appetite and cause diarrhea, so combined use has no well-documented clinically important interaction.
What this interaction means in plain words
Diphenoxylate-atropine and Fenfluramine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Diphenoxylate-atropine belongs to Gastrointestinal Tract; Fenfluramine belongs to Central Nervous System.
Why it happens
Possible additive CNS effects; not well established.
What to do
Monitor for drowsiness and counsel patients on activities requiring alertness.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Fenfluramine
- Fenfluramine + Isocarboxazid Contraindicated
- Fenfluramine + Linezolid Contraindicated
- Fenfluramine + Phenelzine Contraindicated
- Fenfluramine + Selegiline Contraindicated
- Fenfluramine + Tranylcypromine Contraindicated
- Almotriptan + Fenfluramine Major
Frequently asked questions
Can I take Diphenoxylate-atropine with Fenfluramine?
MediHelp rates the interaction as minor. Diphenoxylate-atropine and Fenfluramine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Fenfluramine can cause somnolence and lethargy, so additive sedation is more likely than the opposing effect suggested. Fenfluramine also can reduce appetite and cause diarrhea, so combined use has no well-documented clinically important interaction.
How serious is the interaction between Diphenoxylate-atropine and Fenfluramine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for drowsiness and counsel patients on activities requiring alertness.
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.
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