"this is my 3rd day on phentermine 37.5. i take a half pill in the morning before breakfast and then the other half b/w 1&amp;2. i have still experienced hunger around 12 as if i haven&#039;t ate anything at all. but when i do eat something i am full pretty quickly. my starting weight is 270. i am 5&#039;7 and 22 year old female. i will only be on this for 2 months so i&#039;m hoping for good results along with exercise and healthy eating"