Drug interactions
Doxepin + Milnacipran
Severity: Major
Doxepin 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
Doxepin at antidepressant doses inhibits serotonin and norepinephrine reuptake, so combination with milnacipran increases the risk of serotonin syndrome and cardiovascular stimulation. Low-dose doxepin for insomnia carries less serotonergic risk.
What this interaction means in plain words
Doxepin 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.
Doxepin belongs to Dermatology; Milnacipran belongs to Central Nervous System.
Why it happens
Additive serotonin and norepinephrine reuptake inhibition.
What to do
Avoid the combination at antidepressant doses. If low-dose doxepin is used for sleep, monitor for serotonin toxicity and heart rate or blood pressure rises.
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
Other interactions of Doxepin
- Doxepin + Isocarboxazid Contraindicated
- Doxepin + Phenelzine Contraindicated
- Doxepin + Procarbazine Contraindicated
- Doxepin + Safinamide Contraindicated
- Doxepin + Selegiline Contraindicated
- Doxepin + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Doxepin with Milnacipran?
MediHelp rates the interaction as major. Doxepin 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. Doxepin at antidepressant doses inhibits serotonin and norepinephrine reuptake, so combination with milnacipran increases the risk of serotonin syndrome and cardiovascular stimulation. Low-dose doxepin for insomnia carries less serotonergic risk.
How serious is the interaction between Doxepin 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 the combination at antidepressant doses. If low-dose doxepin is used for sleep, monitor for serotonin toxicity and heart rate or blood pressure rises.
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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