Drug interactions
Buspirone + L-tryptophan
Severity: Moderate
Buspirone and L-tryptophan: 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
Tryptophan is a serotonin precursor, and combining it with buspirone may increase serotonergic activity. Serotonin syndrome has been reported with tryptophan combined with serotonergic drugs, although reports with buspirone are limited.
What this interaction means in plain words
Buspirone and L-tryptophan 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
Additive serotonergic effects through increased serotonin synthesis and 5-HT1A receptor agonism.
What to do
Monitor for serotonin syndrome features such as tremor, clonus, agitation and fever. Use lower tryptophan doses and stop it if symptoms develop.
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 Buspirone
- Buspirone + Isocarboxazid Contraindicated
- Buspirone + Linezolid Contraindicated
- Buspirone + Phenelzine Contraindicated
- Buspirone + Procarbazine Contraindicated
- Buspirone + Selegiline Contraindicated
- Buspirone + Selegiline transdermal Contraindicated
Frequently asked questions
Can I take Buspirone with L-tryptophan?
MediHelp rates the interaction as moderate. Buspirone and L-tryptophan 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. Tryptophan is a serotonin precursor, and combining it with buspirone may increase serotonergic activity. Serotonin syndrome has been reported with tryptophan combined with serotonergic drugs, although reports with buspirone are limited.
How serious is the interaction between Buspirone and L-tryptophan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for serotonin syndrome features such as tremor, clonus, agitation and fever. Use lower tryptophan doses and stop it if symptoms develop.
What other medicines interact with Buspirone?
MediHelp also lists interactions of Buspirone with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Buspirone page.
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