Drug interactions
Gemifloxacin + Olanzapine
Severity: Moderate
Gemifloxacin and Olanzapine: 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 drugs can prolong the QT interval, although olanzapine does so only rarely and to a small degree. Combined use may increase arrhythmia risk in vulnerable patients.
What this interaction means in plain words
Gemifloxacin and Olanzapine 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; Olanzapine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic QT prolongation through cardiac repolarisation effects.
What to do
Obtain a baseline ECG if other QT risk factors exist and correct electrolyte disturbances. Choose an alternative antibiotic if the QTc becomes prolonged.
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 Olanzapine
Frequently asked questions
Can I take Gemifloxacin with Olanzapine?
MediHelp rates the interaction as moderate. Gemifloxacin and Olanzapine 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 drugs can prolong the QT interval, although olanzapine does so only rarely and to a small degree. Combined use may increase arrhythmia risk in vulnerable patients.
How serious is the interaction between Gemifloxacin and Olanzapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG if other QT risk factors exist and correct electrolyte disturbances. Choose an alternative antibiotic if the QTc becomes prolonged.
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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