I have been on Phentermine for 7 weeks almost now. The first 5 weeks I have lost a total of 26lbs. The last two weeks i have lost nothing!!! I increased my exercise ( i work out 20 mins cardio) with a 30 minute walk in the afternoon. I eat about 1200 calories a day. I have done all the tricks everyone has told me. I just dont understand it. Its like i was traveling so well then hit a brick wall. Its so discouraging! Can anyone help me come up with an ideas why this has happen? I do the 100oz of water too. Its just has stopped. I am so upset! i have alot more weight to get off me!