Hi welcome to HCM I can understand your concern for your son s feeling of anxiety. Dear Actually, when one part of your balance-sensing system senses that your body is moving, but the other parts don t. For example, if you are in the moving vehicle , your inner ear may sense the motion of waves, but your eyes don t see any movement , you get motion sickness . Nausea, vomiting, dizziness, sweating, and a sense of feeling unwell are the normal symptoms of Motion sickness , which is very unpleasant , Meclizine prescribed by your dr is an antihistamine that is used to prevent and treat nausea, vomiting, and dizziness caused by motion sickness. It may also be used to reduce dizziness and loss of balance (vertigo) caused by inner ear problems. If you feel any unusual symptom on taking this medication, as its unwanted side effects , report to your dr immidiatly . You can take Homeopathic Cocculus 30 /4 drops in a cup of water /Take 2 table spoons as 1 dose out of this mixture / every 3 hour / before starting journey . It is a tested and treid formula Hope this helps solve your query Take car . All the best