Compare to Claritin Tablets Active Ingredient. The active ingredient in GoodSense Allergy Relief is Loratadine 10 mg, an antihistamine approved for the treatment of both indoor and outdoor allergy symptoms. One dose of GoodSense Allergy Relief works for a full 24 hours. GoodSense Allergy Relief is approved to temporarily relieve indoor and outdoor allergy symptoms in adults and children 6 years and over. Each tablet contains 10 mg of Loratadine, the original prescription strength. It provides 24-hour relief of: sneezing, itchy, watery eyes, runny nose, itchy throat or nose.