The Dramamine dosage for a dog depends upon his weight, according to the Walker Valley Veterinary Hospital. A small dog receives 12.5 milligrams, while medium-sized dogs get 25 milligrams. Fifty milligrams is appropriate for a large dog. In all cases, Dramamine should be given one-half hour before travel.
The Franklin Animal Clinic recommends discussing any questions about Dramamine treatment with the dog's veterinarian. If a pet owner is unsure about the dog's weight, it is better to give a smaller amount than to overdose the pet. The medication is typically used to prevent motion sickness, but it also is helpful in some cases of vomiting. Drowsiness is frequently a side effect of Dramamine.