From an old copy of MIMS (Monthly Index of Medical Specialities) which, in the entry for Stugeron (Cinnarizine) refers the prescriber to a note a the beginning of the particular section; this note reads as follows:
"Antihistamines are useful in the management of.........Motion sickness also responds provided the drug is given before the journey. They may cause drowsiness and patients should be warned of the risks of driving (and presumably also flying) and of the potential interaction with alcohol and other CNS depressants"