Drug interactions
Loxapine + Propantheline
Severity: Moderate
Loxapine and Propantheline: 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
Loxapine's anticholinergic effects add to those of propantheline, raising the risk of dry mouth, constipation, urinary retention, tachycardia, blurred vision and heat intolerance. Severe constipation or ileus can occur, especially in older patients.
What this interaction means in plain words
Loxapine and Propantheline 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.
Why it happens
Additive antimuscarinic effects; slowed gastric motility may also change oral drug absorption.
What to do
Monitor for anticholinergic toxicity, bowel function and urinary retention, and use the lowest effective doses. Choose an alternative to propantheline 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 Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine Major
Frequently asked questions
Can I take Loxapine with Propantheline?
MediHelp rates the interaction as moderate. Loxapine and Propantheline 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. Loxapine's anticholinergic effects add to those of propantheline, raising the risk of dry mouth, constipation, urinary retention, tachycardia, blurred vision and heat intolerance. Severe constipation or ileus can occur, especially in older patients.
How serious is the interaction between Loxapine and Propantheline?
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 toxicity, bowel function and urinary retention, and use the lowest effective doses. Choose an alternative to propantheline if symptoms develop.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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