I have always had this ever since I can remember, even as a child and noone understood when I had to stop when I was running with other kids. I really hated it and still do. However, one day, a few years aback I met an very old doctor just before he retired, this was after trying lots of doctors, he gave me a combination of cimetidine and citrizin hydrochloride, which worked a charm!!! I always used to take it 20 minutes before any activity and it WORKED!!!!!!! However, when I was trying for a baby i decided to stop all medication and since then, even through breastfeeding, i didnt take it because I wasnt active but now that I am I have to! Anyway, ask your doctor see what they say, though some alwasy seem a little puzzled, i wlays just end up saying, just prescribe it will ya!!!! lol Here is my email add! bblm@live.com...let me know how you get on. I am goign back on it, but ever since I stoped, i dont appear to gain weight as much as i used to, coincidence or maybe because I stopped hormonal contraception at the same time...dont know..not a doctor...I am going to experiment again