Drug interactions
Benztropine + Carbidopa-entacapone-levodopa
Severity: Minor
Benztropine and Carbidopa-entacapone-levodopa: minor 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 often used alongside levodopa for tremor, but it may worsen dyskinesia and cause confusion, especially in older patients. At higher doses it can delay gastric emptying and reduce levodopa absorption.
What this interaction means in plain words
Benztropine and Carbidopa-entacapone-levodopa have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Benztropine belongs to Central Nervous System; Carbidopa-entacapone-levodopa belongs to Central Nervous System.
Why it happens
Anticholinergic effects delay gastric emptying, increasing gastric degradation of levodopa, and pharmacodynamically modify basal ganglia cholinergic-dopaminergic balance.
What to do
Monitor for reduced levodopa response, dyskinesia and cognitive effects, and use the lowest effective benztropine dose.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Carbidopa-entacapone-levodopa
- Carbidopa-entacapone-levodopa + Isocarboxazid Contraindicated
- Carbidopa-entacapone-levodopa + Phenelzine Contraindicated
- Carbidopa-entacapone-levodopa + Selegiline transdermal Contraindicated
- Carbidopa-entacapone-levodopa + Tranylcypromine Contraindicated
- Amisulpride + Carbidopa-entacapone-levodopa Major
- Asenapine transdermal + Carbidopa-entacapone-levodopa 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 Carbidopa-entacapone-levodopa?
MediHelp rates the interaction as minor. Benztropine and Carbidopa-entacapone-levodopa have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Benztropine is often used alongside levodopa for tremor, but it may worsen dyskinesia and cause confusion, especially in older patients. At higher doses it can delay gastric emptying and reduce levodopa absorption.
How serious is the interaction between Benztropine and Carbidopa-entacapone-levodopa?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for reduced levodopa response, dyskinesia and cognitive effects, and use the lowest effective benztropine dose.
What other medicines interact with Carbidopa-entacapone-levodopa?
MediHelp also lists interactions of Carbidopa-entacapone-levodopa with, for example, Isocarboxazid, Phenelzine, Selegiline transdermal. The full list is on the Carbidopa-entacapone-levodopa page.
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