"this is like my 5th review and still no complaints.  i started taking phentermine 30 mg on 2/1/14 with a start weight of 215lbs. 12 weeks later on 4/26/14 i weighed 182.5lbs (32.5 lb loss). then i got off of it for a week because i felt i had built up a tolerance. i did eat some extra carbs during this week and worked out but i remained the same weight.  then on 5/3/14 i got back on it (so this is my first week back on) after only 5 days i&#039;ve dropped to 177lbs. that&#039;s 38 lbs in almost 14 weeks! i think cycling off of it was very beneficial and i might even cycle off after shorter periods of 3-4 weeks on and 1 week off. i haven&#039;t had any side effects and i&#039;m still very pleased with my progress."