Which of these is most commonly used as pre-anesthetic medication?

Ans: D. Glycopyrrolate(Ref: Miller 7/e p293; KDT 366, 117)Glycopyrrolate is most commonly used as pre-anesthetic medication.An anlicholinergic drug used for reducing secretions in the mouth, throat, airway, and stomach before surgery.Used before and during surgery to block ceain reflexes and to protect against ceain side effects of some medicines.