Hello
i usually get hives only from going dancing or when i play tennis. if take zytec a couple hours before and i am ok. however the other night, i forgot to take it. i had one drink and danced one song and all of a sudden i could feel it coming in my legs, buttocks and itching head. this was probably the worse it has ever been. it spread through out my whole body to the face,neck and swollen tongue (usually it's neck and below). i could feel my throat closing up b/c i could barely swallow and then i blacked out. when i was conscious again, i had to throw up ever though i didn' eat much before. after that incident, i also experienced a racing heart in the middle of the night or even randomly during the day. one time i even felt it sort of move/jump out of my chest. i am not sure what this is from or how to stop it because i've tried wearing lighter clothes when going out but it still happens. please HELP me!! i'd like to know what this is and how can i prevent it b/c it seems like it keeps getting worse. THANKS