Astelins generic name is Azelastine nasal and it is an antihistamine. It stops the chemical histamine from affecting your body. Astelin in a medicine indicated to people to treat nasal symptoms of allergies like itching, sneezing, runny nose, etc. It is also used to treat other symptoms caused by seasonal or other allergic conditions.
It might be used for some other purposes too, which have not been mentioned in this medical guide.
