Drug interactions
Lithium + Rizatriptan
Severity: Minor
Lithium and Rizatriptan: 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 agents have serotonergic activity, so combined use could theoretically contribute to serotonin syndrome. Clinical reports of this event are rare, and triptans are generally used alongside lithium without difficulty.
What this interaction means in plain words
Lithium and Rizatriptan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Lithium belongs to Central Nervous System; Rizatriptan belongs to Central Nervous System.
Why it happens
Additive serotonergic effects (5-HT1B/1D agonism with lithium enhancement of serotonergic transmission); the interaction is largely theoretical.
What to do
No routine change is needed; educate the patient to report agitation, tremor, sweating, diarrhea or fever after dosing. Stop the triptan and seek assessment if symptoms of serotonin toxicity appear.
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 Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Other interactions of Rizatriptan
- Almotriptan + Rizatriptan Contraindicated
- Dihydroergotamine intranasal + Rizatriptan Contraindicated
- Dihydroergotamine + Rizatriptan Contraindicated
- Eletriptan + Rizatriptan Contraindicated
- Ergoloid mesylates + Rizatriptan Contraindicated
- Ergotamine + Rizatriptan Contraindicated
Frequently asked questions
Can I take Lithium with Rizatriptan?
MediHelp rates the interaction as minor. Lithium and Rizatriptan 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 agents have serotonergic activity, so combined use could theoretically contribute to serotonin syndrome. Clinical reports of this event are rare, and triptans are generally used alongside lithium without difficulty.
How serious is the interaction between Lithium and Rizatriptan?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed; educate the patient to report agitation, tremor, sweating, diarrhea or fever after dosing. Stop the triptan and seek assessment if symptoms of serotonin toxicity appear.
What other medicines interact with Lithium?
MediHelp also lists interactions of Lithium with, for example, Thioridazine, Vandetanib, Aceclofenac. The full list is on the Lithium page.
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