According to a renowned doctor, Dr. Qamar, Antihistamine tablets are the first-line treatment for mild pet allergies with symptoms such as sneezing, runny nose, and itchy eyes. It's important to note that antihistamine comes in various types and how effective a type is may be dependent on the individual body system. For instance, a person with mild cat allergies may benefit from Claritin while someone with more severe allergies can benefit from Zyrtec.