According to Can I Give My Dog, the typical Dramamine dosage for dogs is 2-4 mg for each pound the dog weighs. However, different dogs metabolize the drug at different speeds, so a veterinarian should be consulted for proper dosage.
According to Walker Valley Vet, Dramamine is an effective treatment for motion sickness in dogs. The drug induces lethargy in the dog, though it does not make them sleep. This lethargy keeps them calm and prevents nausea while traveling. Dramamine is thus useful when taking dogs on long car trips.
Although Dramamine effectively combats motion sickness, Can I Give My Dog points out that it also presents several common side effects. The most common side effects are dry mouth and difficulty urinating. In very rare cases, Dramamine produces an unfortunate bout of diarrhea and vomiting. It is best to consult a veterinarian before administering medications to pets.