Duloxetine and Tranylcypromine interaction
Duloxetine and Tranylcypromine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Duloxetine label · effective 2026-03-02
Duloxetine Delayed-Release Capsules are contraindicated in patients who are using or within 14 days of stopping an MAOI intended to treat psychiatric disorders because of an increased risk of serotonin syndrome.
Allow at least 5 days after stopping Duloxetine Delayed-Release Capsules prior to initiation of an MAOI to treat psychiatric disorders. [see Dosage and Administration ( 2.7 ), Warnings and Precautions ( 5.4 )]. who are using other MAOIs such as linezolid or intravenous methylene blue because of an increased risk of serotonin syndrome [see Dosage and Administration…
Concomitant use of monoamine oxidase inhibitors (MAOIs), or use within 14 days of stopping MAOIs ( 4 )
Serotonin Syndrome: Increased risk when co-administered with other serotonergic agents but also when taken alone.
The concomitant use of Duloxetine Delayed-Release Capsules with MAOIs is contraindicated.
From the Tranylcypromine (Tranylcypromine Sulfate) label · effective 2025-07-25
…sulfate tablets if you: take certain medicines, including: antidepressants, such as: other monoamine oxidase inhibitors (MAOIs) selective serotonin reuptake inhibitors (SSRIs) and serotonin and norepinephrine reuptake inhibitors (SNRIs) tricyclic antidepressants other antidepressants, such as amoxapine, bupropion, maprotiline, nefazodone, trazodone, vilazodone,…
Concomitant use or use in rapid succession with other MAOIs; selective serotonin reuptake inhibitors; serotonin and norepinephrine reuptake inhibitors; tricyclic antidepressants; sympathomimetic drugs; and numerous other drugs.
…Non-selective H1 receptor antagonists Antidepressants including but not limited to: Other monoamine oxidase inhibitors (MAOIs) Selective serotonin reuptake inhibitors (SSRIs) and serotonin and norepinephrine reuptake inhibitors (SNRIs) Tricyclic antidepressants Other antidepressants (e.g., amoxapine, bupropion, maprotiline, nefazodone, trazodone, vilazodone,…
Serotonin Syndrome The development of a potentially life-threatening serotonin syndrome has been reported with MAOIs when used concomitantly with other serotonergic drugs.
The concomitant use, or use in rapid succession, of tranylcypromine sulfate tablets with other serotonergic drugs is contraindicated.
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.