Not Medical Advice: The pill with imprint S 521 has been identified as Cetirizine hydrochloride 10 mg.
Cetirizine is an antihistamine that reduces the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. It is used to treat cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose.
Find patient medical information for cetirizine oral including its uses, side effects and safety, interactions, pictures, warnings and user ratings, all from the experts at WebMD.
Medicine may help keep your allergies in check, but you can often minimize your need for these drugs by learning how to avoid allergy triggers. Check out some allergy relief tips wherever you go.