Clarityn Allergy 10mg Tablets Clarityn Allergy 10mg Tablets relieve the symptoms associated with hayfever & other allergies, such as sneezing, runny or itchy nose, & burning or itchy eyes, in one daily dose. They also help relieve the symptoms of urticaria (itching & redness) which is often known as hives or nettle rash. Clarityn Allergy 10mg Tablets contain the active ingredient loratadine, an antihistamine that helps to reduce your allergy symptoms by stopping the effects of a substance called "histamine" which is produced in the body when you are allergic to something. Clarityn Allergy 10mg Tablets are suitable for adults & children over the age of 2 years who weigh more than 30kg.