Phenobarbital Dosage for Dogs The typical dosage of Phenobarbital for dogs is 2–3 mg per kg of body weight, given every 12 hours. 👉 The exact dose depends on: ⚠️ Dosage must always be adjusted by a veterinarian to ensure safety and effectiveness. What Is the Correct Phenobarbital Dosage for Dogs? Phenobarbital is dosed based … Continue reading Phenobarbital Dosage for Dogs: Vet Guidelines, Weight Chart & Safety Tips