Zyrtec is a popular allergy medicine doctors recommend for human patients, but according to PetMD, in the right dosage, the drug is also safe for dogs and cats. Zyrtec treats standard allergy symptoms as well as pet-specific problems like hot spots.
According to the Huffington Post, animals benefit from the same allergy relief humans experience with Zyrtec. Zyrtec, also known as Cetirizine, serves as a histamine blocker and keeps pets from sneezing, coughing and tearing when the weather changes. Some veterinarians also use it to combat food allergies. Before giving this product to an animal, it is important to consult with the dog's veterinarian for the correct dosage.