Drug interactions
Lorcaserin + Sumatriptan
Severity: Moderate
Lorcaserin and Sumatriptan: 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
Both drugs act on the serotonin system, and combining them could increase the risk of serotonin syndrome, with agitation, tremor, hyperthermia, diarrhea and neuromuscular hyperactivity. Lorcaserin is a selective 5-HT2C agonist, so the risk is largely theoretical, but labeling advises caution with triptans.
What this interaction means in plain words
Lorcaserin and Sumatriptan 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 activity (5-HT1B/1D agonism with 5-HT2C agonism), with a theoretical risk of serotonin syndrome.
What to do
Monitor for signs of serotonin syndrome, particularly after starting or increasing either drug. Stop both and give supportive care if symptoms appear.
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 Sumatriptan
- Almotriptan + Sumatriptan Contraindicated
- Dihydroergotamine intranasal + Sumatriptan Contraindicated
- Dihydroergotamine + Sumatriptan Contraindicated
- Eletriptan + Sumatriptan Contraindicated
- Ergoloid mesylates + Sumatriptan Contraindicated
- Ergotamine + Sumatriptan Contraindicated
Frequently asked questions
Can I take Lorcaserin with Sumatriptan?
MediHelp rates the interaction as moderate. Lorcaserin and Sumatriptan 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. Both drugs act on the serotonin system, and combining them could increase the risk of serotonin syndrome, with agitation, tremor, hyperthermia, diarrhea and neuromuscular hyperactivity. Lorcaserin is a selective 5-HT2C agonist, so the risk is largely theoretical, but labeling advises caution with triptans.
How serious is the interaction between Lorcaserin and Sumatriptan?
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 signs of serotonin syndrome, particularly after starting or increasing either drug. Stop both and give supportive care if symptoms appear.
What other medicines interact with Sumatriptan?
MediHelp also lists interactions of Sumatriptan with, for example, Almotriptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Sumatriptan page.
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