One diet pill that really works

A family member was having a very hard time losing weight. He weighed 325 pounds and for 2 years was trying desperately to get down to 240 pounds but couldn't get past 270 pounds. He was exercising 3 times a week at a gym and was on a 2000 calories a day diet. Finally he convinced his doctor he needed something else to help him so he put him on these diet pills that were not meant to be actually diet pills, but what us lay people call, "uppers." He was on them for one month and lost 30 pounds. The doctor took him off of the pills for a month then put him back on them for 2 more months. He got down to 220 pounds and stayed there for several months. I have been waiting for an update to find out if he is back on the pills or not, or if he is finally managing to maintain his weight without pills.