Drug interactions
Pyridostigmine + Trimipramine
Severity: Moderate
Pyridostigmine and Trimipramine: 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 activity of trimipramine opposes pyridostigmine, which may reduce symptom control in myasthenia gravis. Anticholinergic effects such as constipation and urinary retention may also be harder to manage.
What this interaction means in plain words
Pyridostigmine and Trimipramine 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.
Pyridostigmine belongs to Central Nervous System; Trimipramine belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism of cholinergic transmission by tricyclic muscarinic blockade.
What to do
Monitor myasthenic symptoms and adjust the pyridostigmine dose if control worsens. Prefer an antidepressant with low anticholinergic activity when 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 Trimipramine
- Disopyramide + Trimipramine Contraindicated
- Dofetilide + Trimipramine Contraindicated
- Ibutilide + Trimipramine Contraindicated
- Isocarboxazid + Trimipramine Contraindicated
- Pentamidine + Trimipramine Contraindicated
- Phenelzine + Trimipramine Contraindicated
Other interactions of Pyridostigmine
Frequently asked questions
Can I take Pyridostigmine with Trimipramine?
MediHelp rates the interaction as moderate. Pyridostigmine and Trimipramine 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 activity of trimipramine opposes pyridostigmine, which may reduce symptom control in myasthenia gravis. Anticholinergic effects such as constipation and urinary retention may also be harder to manage.
How serious is the interaction between Pyridostigmine and Trimipramine?
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 myasthenic symptoms and adjust the pyridostigmine dose if control worsens. Prefer an antidepressant with low anticholinergic activity when possible.
What other medicines interact with Trimipramine?
MediHelp also lists interactions of Trimipramine with, for example, Disopyramide, Dofetilide, Ibutilide. The full list is on the Trimipramine page.
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