You should give 50 mg of Benadryl to a 50 lb dog, either as two 25 mg tablets, four mg chewable tablets, or 20 ml of a Benadryl liquid form ( mg/5 ml). At the standard concentration, every 5 mL of liquid contains mg of diphenhydramine and can be given at a dosage of mL/lb. For reference, a standard US. Diphenhydramine. 2–4 mg/kg, IM, PO, or SC, q 8–12 h as needed ; Hydroxyzine. –2 mg/kg, PO or IV, q 6–8 h as needed ; Chlorpheniramine. Cats: 2–4 mg/cat, PO, IM.
The best way to determine the correct Benadryl dosage for dogs is to consult your veterinarian. The Merck Veterinary Manual recommends administering The Merck Veterinary Manual suggests that the safe dosage is milligrams of medication per kilogram of weight. This amount can be administered two to three. Diphenhydramine pills are typically 25 mg each, but there are smaller mg tablets and larger 50 mg tablets. You can adjust the tablet dosage in the.