Drug interactions
Granisetron + Zolmitriptan
Severity: Moderate
Granisetron and Zolmitriptan: 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 5-HT3 antagonists and triptans have been linked to rare serotonin syndrome reports when combined. The risk is low, but symptoms such as agitation, tremor, hyperreflexia, sweating and hyperthermia could occur.
What this interaction means in plain words
Granisetron and Zolmitriptan 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.
Granisetron belongs to Gastrointestinal Tract; Zolmitriptan belongs to Central Nervous System.
Why it happens
Possible additive serotonergic effect; the causal link with 5-HT3 antagonists is not firmly established.
What to do
The combination can be used when needed; counsel patients and monitor for signs of serotonin syndrome. Stop both drugs and treat supportively if it develops.
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 Granisetron
- Apomorphine + Granisetron Contraindicated
- Amiodarone + Granisetron Major
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether / lumefantrine + Granisetron Major
- Artemether + Granisetron Major
Other interactions of Zolmitriptan
- Almotriptan + Zolmitriptan Contraindicated
- Dihydroergotamine intranasal + Zolmitriptan Contraindicated
- Dihydroergotamine + Zolmitriptan Contraindicated
- Eletriptan + Zolmitriptan Contraindicated
- Ergoloid mesylates + Zolmitriptan Contraindicated
- Ergotamine + Zolmitriptan Contraindicated
Frequently asked questions
Can I take Granisetron with Zolmitriptan?
MediHelp rates the interaction as moderate. Granisetron and Zolmitriptan 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 5-HT3 antagonists and triptans have been linked to rare serotonin syndrome reports when combined. The risk is low, but symptoms such as agitation, tremor, hyperreflexia, sweating and hyperthermia could occur.
How serious is the interaction between Granisetron and Zolmitriptan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: The combination can be used when needed; counsel patients and monitor for signs of serotonin syndrome. Stop both drugs and treat supportively if it develops.
What other medicines interact with Granisetron?
MediHelp also lists interactions of Granisetron with, for example, Apomorphine, Amiodarone, Amisulpride. The full list is on the Granisetron page.
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