How Much Zyrtec Can I Give My 65 Lb Dog?
How Much Zyrtec Can I Give My 65 Lb Dog? Cetirizine (Zyrtec) 1⁄4 – 1⁄2 mg per pound (one 10mg tab per 30-40 lbs) twice daily. Loratadine (Claritin): 1⁄4 mg per pound (half of a 10mg tablet per 20 lbs) once daily. Clemastine (Tavist-1, Antihist-1): 0.02mg per pound (one 1.34mg tablet per 65lb dog) twice