Drug interactions
Dexfenfluramine + Melatonin
Severity: Minor
Dexfenfluramine and Melatonin: 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
Melatonin is sedating while dexfenfluramine has stimulant-like and serotonergic effects, so their effects may partly oppose each other. No well-documented clinically important interaction exists, and dexfenfluramine is withdrawn from most markets.
What this interaction means in plain words
Dexfenfluramine and Melatonin 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 alertness; no established mechanism.
What to do
No specific action is needed; monitor for altered sleep or 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 Melatonin
- Fluvoxamine + Melatonin Major
- Alfentanil + Melatonin Moderate
- Belladonna and opium + Melatonin Moderate
- Buprenorphine buccal + Melatonin Moderate
- Butabarbital + Melatonin Moderate
- Butalbital + Melatonin Moderate
Frequently asked questions
Can I take Dexfenfluramine with Melatonin?
MediHelp rates the interaction as minor. Dexfenfluramine and Melatonin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Melatonin is sedating while dexfenfluramine has stimulant-like and serotonergic effects, so their effects may partly oppose each other. No well-documented clinically important interaction exists, and dexfenfluramine is withdrawn from most markets.
How serious is the interaction between Dexfenfluramine and Melatonin?
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 specific action is needed; monitor for altered sleep or alertness.
What other medicines interact with Melatonin?
MediHelp also lists interactions of Melatonin with, for example, Fluvoxamine, Alfentanil, Belladonna and opium. The full list is on the Melatonin page.
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