"i started phentermine hcl 37.5 in january 2016, 1/day.  i am 5&#039;7&quot; and weighed 200lbs. i am almost at the end of my 2nd month (3 days left) and now weigh 173lbs.  weight loss to date is 27lbs. i am very happy with the results thus far.  my doc said he would only allow the use of phentermine for 6 months at the most.  i have a check-up every month and have really put my mind to eating healthy foods and no pop or sweets (which were my culprits).  i drink water, but most flavored and never had high-blood pressure.  only side-effect was insomnia for about a week in the beginning.  will start incorporating exercise in month 3 because once you go off, the weight will come back if you haven&#039;t taken the time to change your diet and exercise habits."