Drug interactions
Memantine-donepezil + Ofloxacin
Severity: Moderate
Memantine-donepezil and Ofloxacin: 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 donepezil and ofloxacin can prolong the QT interval. Combined use may increase the risk of torsades de pointes, especially in older patients or those with electrolyte disturbances.
What this interaction means in plain words
Memantine-donepezil and Ofloxacin 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.
Memantine-donepezil belongs to Central Nervous System; Ofloxacin belongs to Anti Bacterial.
Why it happens
Additive QT prolongation through cardiac potassium channel blockade.
What to do
Consider a non-QT-prolonging antibiotic if possible. Otherwise correct potassium and magnesium and obtain an ECG in at-risk patients.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Memantine-donepezil and Ofloxacin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
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 Ofloxacin
- Ofloxacin + Thioridazine Contraindicated
- Adagrasib + Ofloxacin Major
- Amiodarone + Ofloxacin Major
- Amisulpride + Ofloxacin Major
- Anagrelide + Ofloxacin Major
- Arsenic trioxide + Ofloxacin Major
Frequently asked questions
Can I take Memantine-donepezil with Ofloxacin?
MediHelp rates the interaction as moderate. Memantine-donepezil and Ofloxacin 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 donepezil and ofloxacin can prolong the QT interval. Combined use may increase the risk of torsades de pointes, especially in older patients or those with electrolyte disturbances.
How serious is the interaction between Memantine-donepezil and Ofloxacin?
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 a non-QT-prolonging antibiotic if possible. Otherwise correct potassium and magnesium and obtain an ECG in at-risk patients.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
