Hi Stella, yes, your observations on Phentermine are spot on. I researched this molecule for a long time as it makes pleasant changes in brain chemistry; therefore, it is very effective. The faulty Phen-Fen product gave it a bad reputation. Phentermine is still used in many parts of the world as a jumpstart medication to address weight issues. Two stories I linked to this piece provide background to it. Like any drug, it also requires diligence and is not for long-term use.