Identify a common anticholinergic drug used for the management of Parkinson's disease.

Benztropine is a common anticholinergic drug used for managing Parkinson's disease. Its primary function is to help reduce tremors and rigidity associated with the disorder. Anticholinergic medications work by blocking the action of acetylcholine, a neurotransmitter that can be in excess in individuals with Parkinson's disease due to the loss of dopamine-producing neurons. By decreasing acetylcholine activity, benztropine helps to restore a more balanced neurotransmitter system, which alleviates some of the motor symptoms of the disease.

In contrast, medications like ropinirole are dopamine agonists that mimic the action of dopamine and are used to treat Parkinson's, while levodopa is a precursor to dopamine that helps replenish the depleted levels. Elderly care medications are a broad category and do not specifically represent a type of drug used in the management of Parkinson's disease. Thus, benztropine stands out as the anticholinergic that directly addresses some of the symptoms associated with the condition.