Oral administration.
Adult: 50mg to 100mg every 6 to 8 hours.
Children (6 to 12 years): 25mg to 50mg every 6 to 8 hours not exceeding 150mg in 24 hours.
Children (2 to 6 years): Up to 25mg every 6 to 8 hours not exceeding 75mg in 24 hours.
To prevent motion sickness, the first dose should be taken half to 1 hour before starting of activity.