Drug interactions
L-tryptophan + Trimipramine
Severity: Moderate
L-tryptophan and Trimipramine: moderate 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
L-tryptophan is a serotonin precursor and, with a tricyclic antidepressant that inhibits serotonin reuptake, may raise serotonergic activity. Reports describe agitation, tremor, and rarely serotonin syndrome, though risk with trimipramine (a weak reuptake inhibitor) is probably modest.
What this interaction means in plain words
L-tryptophan and Trimipramine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Increased serotonin synthesis from the precursor combined with reuptake inhibition produces additive serotonergic effects.
What to do
Avoid high tryptophan doses with trimipramine and start at low doses if combined. Monitor for agitation, tremor, hyperreflexia, diarrhea, and fever.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Trimipramine
- Disopyramide + Trimipramine Contraindicated
- Dofetilide + Trimipramine Contraindicated
- Ibutilide + Trimipramine Contraindicated
- Isocarboxazid + Trimipramine Contraindicated
- Pentamidine + Trimipramine Contraindicated
- Phenelzine + Trimipramine Contraindicated
Frequently asked questions
Can I take L-tryptophan with Trimipramine?
MediHelp rates the interaction as moderate. L-tryptophan and Trimipramine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. L-tryptophan is a serotonin precursor and, with a tricyclic antidepressant that inhibits serotonin reuptake, may raise serotonergic activity. Reports describe agitation, tremor, and rarely serotonin syndrome, though risk with trimipramine (a weak reuptake inhibitor) is probably modest.
How serious is the interaction between L-tryptophan and Trimipramine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid high tryptophan doses with trimipramine and start at low doses if combined. Monitor for agitation, tremor, hyperreflexia, diarrhea, and fever.
What other medicines interact with Trimipramine?
MediHelp also lists interactions of Trimipramine with, for example, Disopyramide, Dofetilide, Ibutilide. The full list is on the Trimipramine page.
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