They are and I am shocked that he got busted for that. I mean really, it would not have been too hard to diet down to 265. OR ridiculously easy to just diet down to 275-280 and drop some water.
Shit, if he had been busted for diuretic use, trying to get down in weight, I would not have been surprised. And certainly not surprised if he was busted for steroid use.
Unless he has a documented history of asthma (LOL) there is literally no reason for him to take any of the buterol family except to get a performance boost from the stimulant side come fight time, or just because he was lazy in dropping weight and didn't want to change any of his diet.