Allergens are common in most environments and most pets would not react to them. But if your cat is allergic, it could cause extreme reactions in it. Most allergies are harmless but in certain cases the symptoms are so severe that cat allergy medications are prescribed. It is advisable to consult the veterinarian to determine whether the allergy is mild or serious. Allergic reactions in cats can be caused due to a number of reasons and these include, food, flea and tick medications, perfumes, cleaning products, cigarette smoke, rubber and plastic materials, prescription drugs, grass, weed, mold and dust pollens. Unless you become aware of the cause of the allergy, you may not be able to treat it in an effective manner. What are the symptoms of cat allergy? Sneezing, coughing, wheezing Itchy skin and increased scratching of the coat Itchy, runny eyes Itchy back or base of tail Itchy ears and ear infections Vomiting and Diarrhea Snoring caused by an inflamed throat Paw chew