I went back to the dr today for my 4 week appointment. I lost 1 pound! Needless to say I was disappointed. After telling her I had done the same thing I'd done the previous month (probably even fewer calories), she switched my phen to a time-release formula and put me on a thyroid pill. She said that as a result of the reduced calories my metabolism was lowering and told me this would correct that. Has anyone else had their dr do this?