Drug interactions
Homatropine + Ipratropium
Severity: Minor
Homatropine and Ipratropium: minor 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
Homatropine is an antimuscarinic, often in combination with hydrocodone cough products, and may add to the anticholinergic effects of ipratropium. Because inhaled ipratropium is poorly absorbed, the interaction is typically small.
What this interaction means in plain words
Homatropine and Ipratropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Homatropine belongs to Genitourinary; Ipratropium belongs to Respiratory.
Why it happens
Additive muscarinic receptor blockade.
What to do
Monitor for dry mouth, constipation and urinary retention, particularly in older adults. No dose change is normally required.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Ipratropium
- Aclidinium + Ipratropium Moderate
- Benztropine + Ipratropium Moderate
- Bethanechol + Ipratropium Moderate
- Cevimeline + Ipratropium Moderate
- Chlorpromazine + Ipratropium Moderate
- Clomipramine + Ipratropium 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 Homatropine with Ipratropium?
MediHelp rates the interaction as minor. Homatropine and Ipratropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Homatropine is an antimuscarinic, often in combination with hydrocodone cough products, and may add to the anticholinergic effects of ipratropium. Because inhaled ipratropium is poorly absorbed, the interaction is typically small.
How serious is the interaction between Homatropine and Ipratropium?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for dry mouth, constipation and urinary retention, particularly in older adults. No dose change is normally required.
What other medicines interact with Ipratropium?
MediHelp also lists interactions of Ipratropium with, for example, Aclidinium, Benztropine, Bethanechol. The full list is on the Ipratropium page.
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