Drug interactions
Amoxapine + Desvenlafaxine
Severity: Major
Amoxapine and Desvenlafaxine: 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
Both agents block reuptake of serotonin and norepinephrine, so together they raise the risk of serotonin syndrome and noradrenergic effects such as tachycardia and hypertension. Amoxapine also has seizure and cardiac toxicity potential.
What this interaction means in plain words
Amoxapine and Desvenlafaxine 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 serotonin and norepinephrine reuptake inhibition.
What to do
Avoid combined use where possible. If it cannot be avoided, use low doses and monitor blood pressure, heart rate, ECG and signs of serotonin toxicity.
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 Desvenlafaxine
- Desvenlafaxine + Isocarboxazid Contraindicated
- Desvenlafaxine + Methylene blue Contraindicated
- Desvenlafaxine + Phenelzine Contraindicated
- Desvenlafaxine + Rasagiline Contraindicated
- Desvenlafaxine + Safinamide Contraindicated
- Desvenlafaxine + Selegiline Contraindicated
Frequently asked questions
Can I take Amoxapine with Desvenlafaxine?
MediHelp rates the interaction as major. Amoxapine and Desvenlafaxine 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. Both agents block reuptake of serotonin and norepinephrine, so together they raise the risk of serotonin syndrome and noradrenergic effects such as tachycardia and hypertension. Amoxapine also has seizure and cardiac toxicity potential.
How serious is the interaction between Amoxapine and Desvenlafaxine?
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 combined use where possible. If it cannot be avoided, use low doses and monitor blood pressure, heart rate, ECG and signs of serotonin toxicity.
What other medicines interact with Desvenlafaxine?
MediHelp also lists interactions of Desvenlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Desvenlafaxine page.
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