Drug interactions
Gemifloxacin + Venlafaxine
Severity: Moderate
Gemifloxacin and Venlafaxine: 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 gemifloxacin and venlafaxine have been associated with QTc prolongation, so concurrent use may add to arrhythmia risk, especially torsades de pointes. The effect with venlafaxine is generally modest and mainly seen at higher doses or in overdose.
What this interaction means in plain words
Gemifloxacin and Venlafaxine 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.
Gemifloxacin belongs to Anti Bacterial; Venlafaxine belongs to Central Nervous System.
Why it happens
Additive effects on cardiac repolarisation through potassium channel blockade.
What to do
Consider an ECG when other QT risk factors are present, and correct electrolyte abnormalities. Avoid adding further QT-prolonging drugs.
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 Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Other interactions of Venlafaxine
- Isocarboxazid + Venlafaxine Contraindicated
- Methylene blue + Venlafaxine Contraindicated
- Phenelzine + Venlafaxine Contraindicated
- Procarbazine + Venlafaxine Contraindicated
- Rasagiline + Venlafaxine Contraindicated
- Safinamide + Venlafaxine Contraindicated
Frequently asked questions
Can I take Gemifloxacin with Venlafaxine?
MediHelp rates the interaction as moderate. Gemifloxacin and Venlafaxine 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 gemifloxacin and venlafaxine have been associated with QTc prolongation, so concurrent use may add to arrhythmia risk, especially torsades de pointes. The effect with venlafaxine is generally modest and mainly seen at higher doses or in overdose.
How serious is the interaction between Gemifloxacin and Venlafaxine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider an ECG when other QT risk factors are present, and correct electrolyte abnormalities. Avoid adding further QT-prolonging drugs.
What other medicines interact with Gemifloxacin?
MediHelp also lists interactions of Gemifloxacin with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Gemifloxacin page.
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