Hydroxyzine is a pet prescription drug and is available in tablets, capsules, and syrup. The drug is available in 25 mg/ml and 50 mg/ml injectable concentrations. The standard dosage for dogs is 1 mg/lbs (2 mg/kg) 2 – 3 three times a day orally. In cats, the dosage is 0.5 – 1 mg/lbs (1 – 2 mg/kg) or 5 – 10 mg/cat every 8 – 12 hours orally. The duration of the treatment depends on the clinical condition of the pet. It is recommended to continue the treatment, even if the pet shows signs of recovery.