Doxepin is supplied as 10 mg, 25 mg, 50 mg, 75 mg, 100 mg, and 150 mg capsules and as a 10 mg/ml oral concentrate. The recommended dosage for dogs is 0.25 - 0.5 mg/lbs (0.5 to 1 mg/kg) orally twice a day or 1.5 - 2.5 mg/lbs (3 - 5 mg/kg) orally every 8 to 12 hours. There is no recommended dosage for cats. The duration of the dosage is based on the clinical condition of the pet and it is advised to complete the prescription unless otherwise directed by the veterinarian or pharmacist.