I first took phentermine 37.5 about two years ago. The weight melted off! It has slowly creepeed back. Not all of it just about 10 lbs. I first lost thirty. I took phentermine longer than the three months the first time. If I start taking it again, will it work for me still? I took only about 2 week's worth about a month ago. I did not loose anything, but I did not gain. I got the same feeling of not being hungry. If I continue to take it for a month or so, will I see a difference? Someone please let me know what they think.