"i had gastric bypass in 2001 and lost 215 lbs. i gained 60lbs back, still a lot better than 365lbs, but too heavy.  so i started phentermine 37.5 mg.  it&#039;s worked great.  i feel like i did at the beginning of my bypass.  i can&#039;t wait to see how much i&#039;ve lost. i started it in july 19 and i&#039;m down 14 lbs, nearly 1 lb a day."