What drug can be used to treat tremors in Parkinson’s disease?

• A. Scopolamine
• B. Benztropine
• C. Atropine
• D. Ipratropium

Answer: (B)

Benztropine is an anticholinergic medication that is commonly used to treat tremors associated with Parkinson's disease. Parkinson's disease is characterized by motor symptoms such as tremors, rigidity, and bradykinesia caused by the degeneration of dopaminergic neurons in the brain. While dopamine replacement therapies (like levodopa) are often the primary treatment for many of the movement symptoms, anticholinergic drugs like benztropine can be particularly effective in alleviating tremors.

The mechanism of action of benztropine involves the blockade of acetylcholine receptors, which helps restore the balance between dopamine and acetylcholine in the striatum of the brain. This is particularly important in Parkinson's disease, where there is an increase in acetylcholine due to the lack of dopamine, leading to tremors.

In contrast, the other listed medications are not primarily indicated for managing tremors in Parkinson's disease:

• Scopolamine is typically used to treat motion sickness and can cause sedation but is not effective for Parkinsonian tremors.

• Atropine is often used to treat bradycardia and to reduce salivation in surgical settings; it is not indicated for the treatment of Parkinson's symptoms.