I have been taking claritin d for 2 years now. I broke out in hives, runny nose and skin rashes all over my body within hours of taking the first dose! It was very frightening. I went to my family doctor at the time who perscribed prednizone, loratadine and hydrocortisone cream which helped some but it did not cure me completely. Since then I have had no problems with Claritin D except that sometimes when I take too much or for too long at a time it makes me feel sick to my stomach or give me headaches!!! Like most people realize if you use Claritin D every day your symptoms get worse instead of better so try not to abuse this medication!!!