Which of the following statements is true of anticholinergic drugs?
A. Anticholinergic drugs cause bradycardia and pupillary contraction.
B. Anticholinergic drugs are more effective than levodopa and the dopamine agonists.
C. Anticholinergic drugs that act primarily in the periphery are the preferred drugs for treatment.
D. Anticholinergic drugs should be used with caution in patients with glaucoma.
Answer: D
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