A study was published in 1992 that Fen-Phen was more effective than diet and exercise with few side effects. However, in 1997 after 24 cases of heart valve disease in Fen-Phen users, fenfluramine and dexfenfluramine were voluntarily taken off the market at the request of the FDA. Studies later proved that nearly 30% of people taking fenfluramine or dexfenfluramine had abnormal valve findings. The FDA did not ask manufacturers to remove phentermine from the market.
Phentermine is still available by itself in most countries, including the U.S. However, because it is similar to amphetamines, individuals may develop an addiction to it. Hence, it is classified as a controlled substance in many countries. Internationally, phentermine is a schedule IV drug under the Convention on Psychotropic Substances. In the United States, it is classified as a Schedule IV controlled substance under the Controlled Substances Act.
- As found in Wikepedia under "phentermine"
HI, I took phentermine for 2 months then 1 month off and then 2 months on last year it helped me get back in control of my eating habits and gave me the energy to start hitting the gym again I went from 215 to 177 over that time. I have been off of it since January and have lost an additional 7lbs so far this year by keeping track of my calories on this site and continuing to hit the gym on a regular basis. The only side effects I had was occasional insomnia and dry mouth. It was prescribed by my doctor and the my whole program was medically supervised. I feel like it gave me the jump start I needed. Now I am able to continue the good habits that I formed while on the pill. I went from a size 18 down to a size 10. I do not regret taking it. Being 215 is not healthy for a 5'4'' woman. I used it as a jump start to a healthy lifestyle. No regrets here.