im only 17 and ive been on advair for about 3 years now... at fir...

im only 17 and ive been on advair for about 3 years now... at first it was wonderful.. stoped 99% of my asthma symptoms and is still continuing to do so, unfortunately in the last 3 years ive gone from 100 lbs to 140.. i know that since in a teenager this doesnt seem abnormal but it still worries me... im VERY athletic but still continue to gain weight? after reading all the other advair users say that weight gain was a major side affect for them, i have decieded to get off of it.. gradually of course.. hopefully i will start to see a difference.. is this a good idea?