Merck is the parent company to Claritin?, the experts in allergy relief. Allergies are sensitivities of your immune system to something that is ordinarily harmless; symptoms include sneezing, itchy or watery eyes or a runny nose. Outdoor allergies tend to be seasonal while indoor allergies can occur at any time of the year; they are often caused by substances like dust mites, mold spore and pet dander. Count on Claritin? for a range of non?pharmaceutical products designed to help prevent allergy symptoms by reducing common household allergens including dust mites, pet dander and pollen with specially designed anti?allergen bedding and pillows. The product line includes anti?allergen pillow protectors, mattress protectors and comforter covers, specialty anti?allergy pillows designed for folks who prefer to sleep on their back, side or stomach, and down alternative anti?allergen comforters. Improve the quality of your sleep and daily life with Claritin?.