do i have to stack it? i'm sking cause on another forum someone said that this was great for astma (sp?) well, i was diagnoised with astma but ithink i out grew it. this could always help though with cardio and it could help my dad to. he said that he could only do about 1.3 mile and then get outwinded cause of astma but after taking this for a wekk he said that he ran for literally 7 miles and didn't have anything wrong with astma. plus, i heard that it helps loose weight so thats just a benefit. the problem is i heard alot of people tack it with caffein. being only 15 the dude at gnc said that it will cause me to break out bad (all the caffien). so, will ephedrine hcl still work without stacking, just taking it by itself. also, besides breathing and weightloss, does it give any other benefits?