Drug interactions
Bethanechol + Doxepin
Severity: Moderate
Bethanechol and Doxepin: 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
Doxepin has antimuscarinic properties that can counteract bethanechol. This may reduce its benefit for urinary retention or gut hypomotility.
What this interaction means in plain words
Bethanechol and Doxepin 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.
Bethanechol belongs to Gastrointestinal Tract; Doxepin belongs to Dermatology.
Why it happens
Antimuscarinic activity of doxepin opposes muscarinic agonism of bethanechol.
What to do
Monitor for reduced bethanechol response such as persistent retention. Consider a less anticholinergic antidepressant if needed.
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 Bethanechol
- Bethanechol + Darifenacin Major
- Bethanechol + Fesoterodine Major
- Bethanechol + Oxybutynin Major
- Bethanechol + Physostigmine Major
- Amifampridine + Bethanechol Moderate
- Amitriptyline + Bethanechol Moderate
Other interactions of Doxepin
- Doxepin + Isocarboxazid Contraindicated
- Doxepin + Phenelzine Contraindicated
- Doxepin + Procarbazine Contraindicated
- Doxepin + Safinamide Contraindicated
- Doxepin + Selegiline Contraindicated
- Doxepin + Tranylcypromine Contraindicated
Frequently asked questions
Can I take Bethanechol with Doxepin?
MediHelp rates the interaction as moderate. Bethanechol and Doxepin 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. Doxepin has antimuscarinic properties that can counteract bethanechol. This may reduce its benefit for urinary retention or gut hypomotility.
How serious is the interaction between Bethanechol and Doxepin?
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 for reduced bethanechol response such as persistent retention. Consider a less anticholinergic antidepressant if needed.
What other medicines interact with Bethanechol?
MediHelp also lists interactions of Bethanechol with, for example, Darifenacin, Fesoterodine, Oxybutynin. The full list is on the Bethanechol page.
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