Drug interactions
Memantine-donepezil + Pitolisant
Severity: Moderate
Memantine-donepezil and Pitolisant: 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
Pitolisant can prolong the QT interval modestly and donepezil has similar effects. Using both increases arrhythmia risk, particularly in older patients or those with cardiac risk factors.
What this interaction means in plain words
Memantine-donepezil and Pitolisant 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; Pitolisant belongs to Central Nervous System.
Why it happens
Additive QT prolongation.
What to do
Obtain a baseline ECG and monitor QTc when combined, correcting electrolytes. Avoid in patients with known QT prolongation or other 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 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 Pitolisant
- Alfuzosin + Pitolisant Major
- Amiodarone + Pitolisant Major
- Amisulpride + Pitolisant Major
- Anagrelide + Pitolisant Major
- Asenapine + Pitolisant Major
- Bupropion + Pitolisant Major
Frequently asked questions
Can I take Memantine-donepezil with Pitolisant?
MediHelp rates the interaction as moderate. Memantine-donepezil and Pitolisant 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. Pitolisant can prolong the QT interval modestly and donepezil has similar effects. Using both increases arrhythmia risk, particularly in older patients or those with cardiac risk factors.
How serious is the interaction between Memantine-donepezil and Pitolisant?
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 and monitor QTc when combined, correcting electrolytes. Avoid in patients with known QT prolongation or other QT-prolonging drugs.
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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