Drug interactions
Bethanechol + Mecamylamine
Severity: Moderate
Bethanechol and Mecamylamine: 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
Mecamylamine is a ganglionic blocker that lowers blood pressure, while bethanechol is a muscarinic agonist that can cause hypotension and bradycardia. Ganglionic blockade can also blunt autonomic compensation and alter bethanechol's effects, increasing the risk of marked hypotension.
What this interaction means in plain words
Bethanechol and Mecamylamine 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; Mecamylamine belongs to Cardiovascular.
Why it happens
Additive hypotensive effects, with ganglionic blockade impairing compensatory autonomic reflexes.
What to do
Monitor blood pressure and heart rate, especially when starting or adjusting either drug. Counsel patients to rise slowly and reduce the dose if symptomatic hypotension occurs.
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 Mecamylamine
- Lofexidine + Mecamylamine Major
- Mecamylamine + Niacin Moderate
- Mecamylamine + Tizanidine Moderate
- Mecamylamine + Vitamin b3 Moderate
Frequently asked questions
Can I take Bethanechol with Mecamylamine?
MediHelp rates the interaction as moderate. Bethanechol and Mecamylamine 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. Mecamylamine is a ganglionic blocker that lowers blood pressure, while bethanechol is a muscarinic agonist that can cause hypotension and bradycardia. Ganglionic blockade can also blunt autonomic compensation and alter bethanechol's effects, increasing the risk of marked hypotension.
How serious is the interaction between Bethanechol and Mecamylamine?
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 blood pressure and heart rate, especially when starting or adjusting either drug. Counsel patients to rise slowly and reduce the dose if symptomatic hypotension occurs.
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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