Drug interactions
Gemifloxacin + Granisetron
Severity: Major
Gemifloxacin and Granisetron: major 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
Gemifloxacin can prolong the QT interval, and granisetron adds a further effect. The combination may increase the risk of ventricular arrhythmias, particularly with electrolyte disturbances or heart disease.
What this interaction means in plain words
Gemifloxacin and Granisetron can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Gemifloxacin belongs to Anti Bacterial; Granisetron belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation via inhibition of cardiac potassium channels.
What to do
Avoid the combination in patients with QT risk factors and consider an alternative antibiotic. If unavoidable, check the ECG and correct potassium and magnesium.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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 Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Frequently asked questions
Can I take Gemifloxacin with Granisetron?
MediHelp rates the interaction as major. Gemifloxacin and Granisetron can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Gemifloxacin can prolong the QT interval, and granisetron adds a further effect. The combination may increase the risk of ventricular arrhythmias, particularly with electrolyte disturbances or heart disease.
How serious is the interaction between Gemifloxacin and Granisetron?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination in patients with QT risk factors and consider an alternative antibiotic. If unavoidable, check the ECG and correct potassium and magnesium.
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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