"hi today is nov 12 2013. i started taking phentermine 37.5 on nov 6 2013 my weight on the 6 th was 198lbs. today i am 191.. i have not worked out on the pill because i have a cousin who lost 50lbs without working out.. i eat 3 small meals a day and 2 snacks. i don&#039;t eat after 6 pm and i drink plently of water. no juice or soada.. my question is to all who has taking phentermine 37.5 along with a b12 pill once a week. will this pill continue to work like this?? i am getting married in 6 months and i am so worried because i would love to get down to 150lbs by that time.. i plan to get of this pill in 3 months.. i have been loosing so quick and it has not been a week yet..my weight loss doctor prescribed them to me."