Drug interactions
Amitriptyline + Neostigmine
Severity: Moderate
Amitriptyline and Neostigmine: 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
The anticholinergic effects of amitriptyline can counteract the cholinergic effects of neostigmine, which may reduce its efficacy in conditions such as myasthenia gravis. The clinical impact varies with dose.
What this interaction means in plain words
Amitriptyline and Neostigmine 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.
Amitriptyline belongs to Central Nervous System; Neostigmine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism between muscarinic blockade and cholinesterase inhibition.
What to do
Monitor muscle strength and symptom control in myasthenia gravis, adjusting neostigmine dose if needed. Prefer a less anticholinergic antidepressant where possible.
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 Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Other interactions of Neostigmine
Frequently asked questions
Can I take Amitriptyline with Neostigmine?
MediHelp rates the interaction as moderate. Amitriptyline and Neostigmine 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. The anticholinergic effects of amitriptyline can counteract the cholinergic effects of neostigmine, which may reduce its efficacy in conditions such as myasthenia gravis. The clinical impact varies with dose.
How serious is the interaction between Amitriptyline and Neostigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor muscle strength and symptom control in myasthenia gravis, adjusting neostigmine dose if needed. Prefer a less anticholinergic antidepressant where possible.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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