Drug interactions
Homatropine + Meclizine
Severity: Moderate
Homatropine and Meclizine: 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 agents block muscarinic receptors, so together they can produce additive anticholinergic effects including dry mouth, constipation, urinary retention and blurred vision. Homatropine is often in cough combinations with hydrocodone, which adds sedation.
What this interaction means in plain words
Homatropine and Meclizine 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.
Homatropine belongs to Genitourinary; Meclizine belongs to Respiratory.
Why it happens
Additive antimuscarinic effects.
What to do
Monitor for anticholinergic effects and sedation, particularly in older patients. Avoid in glaucoma or urinary obstruction.
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 Meclizine
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 Meclizine?
MediHelp rates the interaction as moderate. Homatropine and Meclizine 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 agents block muscarinic receptors, so together they can produce additive anticholinergic effects including dry mouth, constipation, urinary retention and blurred vision. Homatropine is often in cough combinations with hydrocodone, which adds sedation.
How serious is the interaction between Homatropine and Meclizine?
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 effects and sedation, particularly in older patients. Avoid in glaucoma or urinary obstruction.
What other medicines interact with Meclizine?
MediHelp also lists interactions of Meclizine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Meclizine page.
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