My vet said I could use meclizine for Huey once when he exhibited symptoms of dizziness. Meclizine human prescription is Antivert (for vertigo), but the nonprescription version is "non drowsy dramamine" . That might be something to try for motion sickness. For dogs under 10 lbs, give 6.25mg 1 hr prior to travel. (1/4 tablet)
