Drug interactions
Isoflurane + Memantine-donepezil
Severity: Moderate
Isoflurane 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
Isoflurane can prolong the QT interval during anesthesia. Donepezil adds QT and bradycardic effects and also may prolong the action of succinylcholine-type relaxants, which matters in the perioperative setting.
What this interaction means in plain words
Isoflurane 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.
Isoflurane belongs to Central Nervous System; Memantine-donepezil belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with donepezil cholinesterase inhibition adding vagotonic effects.
What to do
Inform the anesthesia team about donepezil use and monitor ECG continuously during surgery. Correct electrolytes beforehand and be prepared to treat bradycardia.
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 Isoflurane
Frequently asked questions
Can I take Isoflurane with Memantine-donepezil?
MediHelp rates the interaction as moderate. Isoflurane 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. Isoflurane can prolong the QT interval during anesthesia. Donepezil adds QT and bradycardic effects and also may prolong the action of succinylcholine-type relaxants, which matters in the perioperative setting.
How serious is the interaction between Isoflurane 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: Inform the anesthesia team about donepezil use and monitor ECG continuously during surgery. Correct electrolytes beforehand and be prepared to treat bradycardia.
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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