Drug interactions
Benztropine + Clozapine
Severity: Moderate
Benztropine and Clozapine: 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 drugs are strongly anticholinergic, so combined use raises the risk of constipation, ileus, urinary retention, dry mouth, tachycardia and cognitive impairment. Clozapine is used with little extrapyramidal toxicity, so benztropine is often unnecessary.
What this interaction means in plain words
Benztropine and Clozapine 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.
Benztropine belongs to Central Nervous System; Clozapine belongs to Central Nervous System.
Why it happens
Additive antimuscarinic effects.
What to do
Monitor bowel function and anticholinergic symptoms, and review whether benztropine is still needed. Use a laxative regimen if required.
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 Clozapine
- Clozapine + Deferiprone Contraindicated
- Clozapine + Irinotecan Contraindicated
- Clozapine + Pimozide Contraindicated
- Clozapine + Thioridazine Contraindicated
- Acalabrutinib + Clozapine Major
- Adagrasib + Clozapine Major
Other interactions of Benztropine
- Benztropine + Memantine-donepezil Major
- Abobotulinumtoxina + Benztropine Moderate
- Amantadine + Benztropine Moderate
- Amitriptyline + Benztropine Moderate
- Amoxapine + Benztropine Moderate
- Atropine iv / + Benztropine Moderate
Frequently asked questions
Can I take Benztropine with Clozapine?
MediHelp rates the interaction as moderate. Benztropine and Clozapine 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 drugs are strongly anticholinergic, so combined use raises the risk of constipation, ileus, urinary retention, dry mouth, tachycardia and cognitive impairment. Clozapine is used with little extrapyramidal toxicity, so benztropine is often unnecessary.
How serious is the interaction between Benztropine and Clozapine?
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 bowel function and anticholinergic symptoms, and review whether benztropine is still needed. Use a laxative regimen if required.
What other medicines interact with Clozapine?
MediHelp also lists interactions of Clozapine with, for example, Deferiprone, Irinotecan, Pimozide. The full list is on the Clozapine page.
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