Dosing Information of Ondansetron for Dogs and Cats.
Medication should never be administered without first consulting your veterinarian.
In dogs, the usual dose is 0.05 to 0.5 mg per pound (0.1 to 1.0 mg/kg) orally every 12 to 24 hours.
The intravenous dose is 0.05 to 0.1 mg per pound (0.1 to 0.2 mg/kg).