Drug interactions
Benztropine + Pimozide
Severity: Moderate
Benztropine and Pimozide: 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
Benztropine is a potent anticholinergic and pimozide has some anticholinergic activity, so the combination can intensify dry mouth, constipation, urinary retention, blurred vision, and confusion. Benztropine is often given deliberately to treat pimozide-induced extrapyramidal symptoms, but older patients are prone to cognitive adverse effects.
What this interaction means in plain words
Benztropine and Pimozide 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; Pimozide belongs to Central Nervous System.
Why it happens
Additive antimuscarinic effects.
What to do
Use benztropine only when extrapyramidal symptoms require it, at the lowest effective dose. Monitor for confusion, constipation, urinary retention, and heat intolerance.
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 Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
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 Pimozide?
MediHelp rates the interaction as moderate. Benztropine and Pimozide 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 is a potent anticholinergic and pimozide has some anticholinergic activity, so the combination can intensify dry mouth, constipation, urinary retention, blurred vision, and confusion. Benztropine is often given deliberately to treat pimozide-induced extrapyramidal symptoms, but older patients are prone to cognitive adverse effects.
How serious is the interaction between Benztropine and Pimozide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use benztropine only when extrapyramidal symptoms require it, at the lowest effective dose. Monitor for confusion, constipation, urinary retention, and heat intolerance.
What other medicines interact with Pimozide?
MediHelp also lists interactions of Pimozide with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pimozide page.
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