Drug interactions
Diphenoxylate-atropine + Loxapine
Severity: Moderate
Diphenoxylate-atropine and Loxapine: 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 has anticholinergic properties that add to those of atropine, which may cause constipation, urinary retention, blurred vision, tachycardia and confusion. Diphenoxylate may also add to CNS depression, and slowed gut motility could alter oral loxapine absorption.
What this interaction means in plain words
Diphenoxylate-atropine and Loxapine 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.
Diphenoxylate-atropine belongs to Gastrointestinal Tract; Loxapine belongs to Central Nervous System.
Why it happens
Additive antimuscarinic and CNS depressant effects, with possible reduced GI absorption from slowed motility.
What to do
Monitor for anticholinergic toxicity and sedation, especially in older patients. Reduce doses or use alternatives 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 Diphenoxylate-atropine
- Diphenoxylate-atropine + Isocarboxazid Contraindicated
- Diphenoxylate-atropine + Phenelzine Contraindicated
- Diphenoxylate-atropine + Tranylcypromine Contraindicated
- Alfentanil + Diphenoxylate-atropine Major
- Alvimopan + Diphenoxylate-atropine Major
- Amitriptyline + Diphenoxylate-atropine Major
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 Diphenoxylate-atropine with Loxapine?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Loxapine 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 has anticholinergic properties that add to those of atropine, which may cause constipation, urinary retention, blurred vision, tachycardia and confusion. Diphenoxylate may also add to CNS depression, and slowed gut motility could alter oral loxapine absorption.
How serious is the interaction between Diphenoxylate-atropine and Loxapine?
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 and sedation, especially in older patients. Reduce doses or use alternatives if symptoms develop.
What other medicines interact with Diphenoxylate-atropine?
MediHelp also lists interactions of Diphenoxylate-atropine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Diphenoxylate-atropine page.
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