- a synthetic, crystalline, antihistamine powder, C17H22NO⋅C7H6ClN4O2, used in the treatment of allergic disorders and as a preventive for seasickness and airsickness.
- a white slightly soluble bitter-tasting crystalline substance: an antihistamine used in the prevention of nausea, esp in travel sickness. Formula: C 24 H 28 ClN 5 O 3
