<prompt> Which of the following drugs increases gastro- intestinal motility?GlycopyrrolateAtropineNeostigmineFentanyl  <response>: Ans. C NeostigmineRef: KDT 8the p130Cholinergic drugs increase GI motility. Neostigmine is an inhibitor of the enzyme AChE which is responsible for the breakdown of ACh. It thus acts like a cholinergic agent.Glycopyrrolate and atropine are anticholinergic drugs; thus reduce GI motility. Fentanyl is an opioid and can cause constipation. 