Drug interactions
Pimavanserin + Sumatriptan
Severity: Minor
Pimavanserin and Sumatriptan: minor 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 serotonergic pathways, so combining them may theoretically contribute to serotonin toxicity. Pimavanserin is a 5-HT2A inverse agonist rather than a classic serotonin enhancer, so clinical evidence of harm is limited.
What this interaction means in plain words
Pimavanserin and Sumatriptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Pimavanserin belongs to Central Nervous System; Sumatriptan belongs to Central Nervous System.
Why it happens
Theoretical additive serotonergic effects; no well-established pharmacokinetic or pharmacodynamic mechanism has been demonstrated.
What to do
Co-administration is generally acceptable; counsel the patient to report agitation, tremor, sweating or fever. Stop the triptan and seek assessment if serotonin toxicity is suspected.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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
Other interactions of Pimavanserin
- Lefamulin + Pimavanserin Contraindicated
- Pimavanserin + Pimozide Contraindicated
- Pimavanserin + Vandetanib Contraindicated
- Adagrasib + Pimavanserin Major
- Amiodarone + Pimavanserin Major
- Amisulpride + Pimavanserin Major
Frequently asked questions
Can I take Pimavanserin with Sumatriptan?
MediHelp rates the interaction as minor. Pimavanserin and Sumatriptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Both drugs act on serotonergic pathways, so combining them may theoretically contribute to serotonin toxicity. Pimavanserin is a 5-HT2A inverse agonist rather than a classic serotonin enhancer, so clinical evidence of harm is limited.
How serious is the interaction between Pimavanserin and Sumatriptan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Co-administration is generally acceptable; counsel the patient to report agitation, tremor, sweating or fever. Stop the triptan and seek assessment if serotonin toxicity is suspected.
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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