Does diet pills really work? Some diet pills work on people and some does not. Recently there is a contest going on in my office because the HR is emphasizing on Health among all the employees. Hence, there is this contest similar to the one in the reality show ” Biggest Looser”. One of my colleague was telling me that she is joining the contest and she is gonna take her phentermine pills to loose off the extra pounds! Gosh…like this also can just because of the RM1,000 prize money.