Which statement correctly identifies an anticholinergic medication used for Parkinson's disease?

• A. Selegiline is an anticholinergic.
• B. Benztropine is an anticholinergic.
• C. Levodopa is an anticholinergic.
• D. Carbidopa is an anticholinergic.

Answer: (D)

Anticholinergic meds used for Parkinson's disease work by blocking acetylcholine activity in the striatum, which helps rebalance the reduced dopamine signaling and can lessen tremor and rigidity, especially in younger patients with tremor-dominant PD. A commonly used anticholinergic is benztropine, which reduces cholinergic stimulation and can improve tremor. The other options are not anticholinergic: selegiline is an MAO-B inhibitor that slows dopamine breakdown; levodopa is a dopamine precursor; and carbidopa is a peripheral inhibitor that prevents levodopa loss before it reaches the brain. Therefore, benztropine is the anticholinergic medication among these.