Drug interactions
Dexfenfluramine + Milnacipran
Severity: Major
Dexfenfluramine and Milnacipran: major interaction.
Last updated Sources: US FDA label
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
Dexfenfluramine releases serotonin and inhibits its reuptake, and milnacipran also increases serotonergic activity. The combination raises the risk of serotonin syndrome.
What this interaction means in plain words
Dexfenfluramine and Milnacipran can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive serotonergic effects from serotonin release and reuptake inhibition.
What to do
Avoid combining these agents. Dexfenfluramine is withdrawn in most markets, so choose an alternative.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Milnacipran
- Isocarboxazid + Milnacipran Contraindicated
- Methylene blue + Milnacipran Contraindicated
- Milnacipran + Phenelzine Contraindicated
- Milnacipran + Procarbazine Contraindicated
- Milnacipran + Rasagiline Contraindicated
- Milnacipran + Safinamide Contraindicated
Frequently asked questions
Can I take Dexfenfluramine with Milnacipran?
MediHelp rates the interaction as major. Dexfenfluramine and Milnacipran can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Dexfenfluramine releases serotonin and inhibits its reuptake, and milnacipran also increases serotonergic activity. The combination raises the risk of serotonin syndrome.
How serious is the interaction between Dexfenfluramine and Milnacipran?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining these agents. Dexfenfluramine is withdrawn in most markets, so choose an alternative.
What other medicines interact with Milnacipran?
MediHelp also lists interactions of Milnacipran with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Milnacipran page.
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