Drug interactions
Glycopyrronium + Homatropine
Severity: Moderate
Glycopyrronium and Homatropine: 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
Both drugs block muscarinic receptors, so combined use can increase dry mouth, constipation, urinary retention, tachycardia and blurred vision. The risk is highest in elderly patients and those with glaucoma or prostatic enlargement.
What this interaction means in plain words
Glycopyrronium and Homatropine 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.
Glycopyrronium belongs to Respiratory; Homatropine belongs to Genitourinary.
Why it happens
Additive antimuscarinic pharmacodynamic effects.
What to do
Monitor for anticholinergic adverse effects and avoid duplicate therapy where possible. Reduce dose if symptoms develop.
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 Glycopyrronium
- Clozapine + Glycopyrronium Major
- Abobotulinumtoxina + Glycopyrronium Moderate
- Aclidinium + Glycopyrronium Moderate
- Amantadine + Glycopyrronium Moderate
- Amitriptyline + Glycopyrronium Moderate
- Amoxapine + Glycopyrronium Moderate
Other interactions of Homatropine
- Amantadine + Homatropine Moderate
- Amitriptyline + Homatropine Moderate
- Atropine + Homatropine Moderate
- Benztropine + Homatropine Moderate
- Bethanechol + Homatropine Moderate
- Chlorpromazine + Homatropine Moderate
Frequently asked questions
Can I take Glycopyrronium with Homatropine?
MediHelp rates the interaction as moderate. Glycopyrronium and Homatropine 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. Both drugs block muscarinic receptors, so combined use can increase dry mouth, constipation, urinary retention, tachycardia and blurred vision. The risk is highest in elderly patients and those with glaucoma or prostatic enlargement.
How serious is the interaction between Glycopyrronium and Homatropine?
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 anticholinergic adverse effects and avoid duplicate therapy where possible. Reduce dose if symptoms develop.
What other medicines interact with Glycopyrronium?
MediHelp also lists interactions of Glycopyrronium with, for example, Clozapine, Abobotulinumtoxina, Aclidinium. The full list is on the Glycopyrronium page.
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