In case of hill journey, antimotion sickness drugs are best administered at:
(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.
Twelve hours before commencing journey
One hour before commencing journey
Immediately after commencing journey
At the first feeling of motion sickness
Other topics and Adverse effects