"i have been taking phentermine for 20 days now and i have never felt better! i am 21 years old i started out at 289 lbs and is of today i&#039;m 274 lb with that being said i have done a total life change. i quit eating fast food, and any sweets, no soda or energy drinks, and the hardest one for me is i have dropped from drinking around 30 beers a week to my limit or 2 a week. it has been hard but i know it is totally worth it! the only side effect i have seen is my blood pressure seems to by high for the first couple hours i take it."