<prompt> Which of the following is used as a preanaesthetic medication?PropantheleneGlycopyrrolateIpratropium bromideHyoscine  <response>: Ans. is b d i.e., Glycopyrrolate Hyoscine Drugs used in premedication1.Sedative - antianxiety-DiazepamLorazepamMidazolam.-Lorazepam is used most commonly-Midazolam is used for day care surgery2.Opioids-MorphinePethidine3.Anticholinergics-Atropine Hyoscine Glycopyrrolate.4.Neuroleptics-Haloperidolchlorapromazinetriflupromazine5.H2 blocker or proton pump inhibitor-RanitidineFamotidine, omeprazolePantoprazole.6.Antiemitics-Metoclopramide Domperidone Ondansetron Hyoscine Ondansetron To control secretion, anticholinergics Glycopyrrolate, atropine or scopolamine are used. Gycopyrrolate is a preferred anticholinergic over atropine and scopolamine hyoscine because it does not crosses blood brain barrier and devoid of central side effects.Note: Atropine is a natural alkaloid, used in OPC poisoning and has profound central CNS effects. 