This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
In case of hill journey, antimotion sickness drugs are best administered at: 
Select and explain. 
A. Twelve hours before commencing journey, B. One hour before commencing journey, C. Immediately after commencing journey, D. At the first feeling of motion sickness
B: One hour before commencing journey
Answer: B: One hour before commencing journey 
Explanation: (Ref: KDT 6/e p641) Hyoscine is administered half to one hour before journey for prevention of motion sickness. It has no role once the vomiting stas.