"i started taking phentermine 37.5mg, 1tab 2hrs after brkfst and half tab 6hrs before sleep. first day i experienced fast heart rate, dry mouth and insomnia after a couple days it went away.i go to the gym 3x a week, have to remind myself to eat at times. i started on march 30 2015 weighing at 207lbs my current weight today 06/18/15 is 179.6lbs i&#039;m really happy i don&#039;t think i ever weighed this much since jr high. nothing has worked for me,but phentermine sure has, highly recommended."