Question: how many milligrams of benadryl can i give my cat?
Answer: Benadryl Dosage for Cats Typically, cats take 1 mg of Benadryl for each pound of body weight two to three times a day. This means a 12.5-pound cat will take half of a 25 mg Benadryl tablet up to three times a day, depending on your veterinarian's recommendation.