<prompt> All of the following drug may be used for motion sickness except -HyoscineDicyclomineDomperidoneScopolmine  <response>: Ans. is c i.e., Domperidone o Drugs used are : a Anticholinergics -- Hyoscine Scopolamine, Dicyclomine. b Hl-antihistaminic --- Promethazine, cyclizine, meclizine, cinnarizine, etc. o Hyoscine scopolamine is the most effective drug for motion sickness. About option c o Domperidone is a prokinetic drug and acts by D2 blockade. It is ineffective in motion sickness as vestibular pathway does not involve dopaminergic link. 