I\'ve suffered from exercise induced hives since I was about 5 years old and I\'m 35 now. Up until recently I had to stop exercising and only exercies for about 15 minutes take a break until the bumps and iching subsided and start again. Now I take Zyrtec and allergy medicine. All anti histimines are not created equal it has to be one that has been indicated for hive and as far as I know Zyrtec is the only one (Claritin has recently been indicated for hives but it doesn\'t work for me). I take one 10 mg Zyrtec an hour before I train and I have no hives or itching.