This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Drug of choice for hyperhidrosis is 
Select and explain. 
A. Phenylephrine, B. Atropine, C. Darifenacin, D. Trospium
C: Darifenacin
Answer: C: Darifenacin 
Explanation: Darifenacin is considered as drug of choice for hyperhidrosis-excess sweating as it blocks m3 receptors on sweat glands Ref: KDT 6th ed pg 118