"i took phentermine in november and december of 2013 and january of 2014. i went from 178 pounds to 137. 137 is my target weight, and ideal weight. i kept the weight off until this past spring/summer ( 2016 ). and then went back to my old habits and of managed to gain enough weight to put me at 176.2 as of this morning at the doctor. so, i&#039;m 50 yrs old, 5&#039;6&quot; and weigh 176.2. i started the phentermine right after the doctor&#039;s appointment. i&#039;m a little bit jittery today loss of appetite is already taken effect, as has dry mouth. i go back to the doctor in 30 days, but i will weigh myself on wednesdays"