Drug interactions
Cyproheptadine + Diethylpropion
Severity: Minor
Cyproheptadine and Diethylpropion: 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
Cyproheptadine causes sedation, while diethylpropion is a stimulant anorectic, so their effects on alertness may partly oppose each other. The combination is unpredictable, and cyproheptadine's serotonin and appetite effects may also work against weight-loss therapy.
What this interaction means in plain words
Cyproheptadine and Diethylpropion have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opposing pharmacodynamic effects on central arousal; no established pharmacokinetic interaction.
What to do
No dose change is routinely needed. Monitor alertness and weight response, and reassess whether cyproheptadine is needed if appetite increases.
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 Cyproheptadine
- Cyproheptadine + Isocarboxazid Contraindicated
- Cyproheptadine + Phenelzine Contraindicated
- Cyproheptadine + Tranylcypromine Contraindicated
- Alfentanil + Cyproheptadine Major
- Belladonna and opium + Cyproheptadine Major
- Benzhydrocodone / acetaminophen + Cyproheptadine Major
Frequently asked questions
Can I take Cyproheptadine with Diethylpropion?
MediHelp rates the interaction as minor. Cyproheptadine and Diethylpropion have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cyproheptadine causes sedation, while diethylpropion is a stimulant anorectic, so their effects on alertness may partly oppose each other. The combination is unpredictable, and cyproheptadine's serotonin and appetite effects may also work against weight-loss therapy.
How serious is the interaction between Cyproheptadine and Diethylpropion?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change is routinely needed. Monitor alertness and weight response, and reassess whether cyproheptadine is needed if appetite increases.
What other medicines interact with Cyproheptadine?
MediHelp also lists interactions of Cyproheptadine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Cyproheptadine page.
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