Quoting wikipedia

" Internationally, phentermine is a schedule IV drug under the Convention on Psychotropic Substances.[1] In the United States, it is classified as a Schedule IV controlled substance under the Controlled Substances Act."

http://en.wikipedia.org/wiki/Phentermine

http://en.wikipedia.org/wiki/Controlled_Substan...

Together with working out phen showed really good results for me.

But since my doc does not prescribed me phen anymore because of the side effects I have started acomplia since new year, which is non-controlled prescription weight loss drug. results are ok. losing about 2 pounds weekly, lucky to have no side effects so far. For acomplia info these are good sources.

http://www.effectivedietpill.info

http://www.youtube.com/watch?v=rsPCTGyufho

But people with a history of depression and anxiety should avoid acomplia as it can have some mental side effects for them.