Drug interactions
Clozapine + Scopolamine
Severity: Major
Clozapine and Scopolamine: major 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
Clozapine is strongly anticholinergic, and scopolamine adds to this burden. The combination raises the risk of constipation that can progress to ileus, urinary retention, delirium and tachycardia, and sedation is additive.
What this interaction means in plain words
Clozapine and Scopolamine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Clozapine belongs to Central Nervous System; Scopolamine belongs to Respiratory.
Why it happens
Additive muscarinic receptor blockade with reduced gastrointestinal motility, plus additive sedation.
What to do
Avoid the combination where possible, and if used monitor bowel function closely and for delirium and urinary retention. Treat constipation early and reconsider scopolamine if gut hypomotility appears.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Scopolamine
Other interactions of Clozapine
- Clozapine + Deferiprone Contraindicated
- Clozapine + Irinotecan Contraindicated
- Clozapine + Pimozide Contraindicated
- Clozapine + Thioridazine Contraindicated
- Acalabrutinib + Clozapine Major
- Adagrasib + Clozapine Major
Frequently asked questions
Can I take Clozapine with Scopolamine?
MediHelp rates the interaction as major. Clozapine and Scopolamine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Clozapine is strongly anticholinergic, and scopolamine adds to this burden. The combination raises the risk of constipation that can progress to ileus, urinary retention, delirium and tachycardia, and sedation is additive.
How serious is the interaction between Clozapine and Scopolamine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible, and if used monitor bowel function closely and for delirium and urinary retention. Treat constipation early and reconsider scopolamine if gut hypomotility appears.
What other medicines interact with Scopolamine?
MediHelp also lists interactions of Scopolamine with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Scopolamine page.
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