What indicates the client needs further education on benztropine mesylate?

The statement indicating the need for further education about benztropine mesylate is the claim about sitting in the sun to enhance medication effectiveness. Benztropine mesylate is an anticholinergic medication commonly used to manage symptoms of Parkinson's disease and drug-induced extrapyramidal symptoms. There is no evidence or pharmacological rationale supporting the idea that sun exposure can enhance the effectiveness of this medication. Instead, patients taking anticholinergic drugs need to be cautious about overheating, as these medications can impair sweating and increase the risk of heat-related issues.

On the other hand, the other statements reflect appropriate understanding and precautions associated with the medication. Avoiding driving while on this medication is sensible due to potential side effects such as drowsiness or impaired coordination. Recognizing that benztropine mesylate may cause dry mouth is important for managing side effects, and understanding that one must not abruptly stop the medication even if symptoms improve underscores the need for continuity in treatment.