Drug interactions
Gemifloxacin + Memantine-donepezil
Severity: Moderate
Gemifloxacin and Memantine-donepezil: 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
Gemifloxacin can prolong the QT interval and donepezil has QT-prolonging potential, so combined use may raise the risk of torsades de pointes. The risk is higher with bradycardia, electrolyte abnormalities or older age.
What this interaction means in plain words
Gemifloxacin and Memantine-donepezil 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; Memantine-donepezil belongs to Central Nervous System.
Why it happens
Additive QT prolongation.
What to do
Consider an alternative antibiotic with less QT effect. If combined, correct electrolytes and monitor the ECG.
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 Memantine-donepezil
- Dronedarone + Memantine-donepezil Contraindicated
- Memantine-donepezil + Thioridazine Contraindicated
- Amantadine + Memantine-donepezil Major
- Amiodarone + Memantine-donepezil Major
- Amisulpride + Memantine-donepezil Major
- Amitriptyline + Memantine-donepezil 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 Memantine-donepezil?
MediHelp rates the interaction as moderate. Gemifloxacin and Memantine-donepezil 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 can prolong the QT interval and donepezil has QT-prolonging potential, so combined use may raise the risk of torsades de pointes. The risk is higher with bradycardia, electrolyte abnormalities or older age.
How serious is the interaction between Gemifloxacin and Memantine-donepezil?
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 alternative antibiotic with less QT effect. If combined, correct electrolytes and monitor the ECG.
What other medicines interact with Memantine-donepezil?
MediHelp also lists interactions of Memantine-donepezil with, for example, Dronedarone, Thioridazine, Amantadine. The full list is on the Memantine-donepezil page.
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