This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
To avoid motion sickness, an antiemetic drug should be administered: 
Select and explain. 
A. A day before the journey, B. After ﬁrst vomiting, C. 1 hour before the journey, D. 12 hours before the journey
C: 1 hour before the journey
Answer: C: 1 hour before the journey 
Explanation: Hyoscine is administered half to one hour before the journey for the prevention of motion sickness. It has no role once the vomiting starts.