"this is the first day on belviq xr so i haven&#039;t been able to notice much of a change in my eating lesser. i didn&#039;t experience any headaches or nausea. actually had a little more energy. now i&#039;ve just did 3 months on phentermine 37.5 mg and i went from 282 lbs to 251 lbs(without exercising much) i wanted to continue the phentermine. but my doctor said 3 months is the limit. he suggest i try belviq since you can remind on belviq longer. i am 5&#039;10&#039; and current weight is 251 lbs. my goal is too get down to 190 lbs and i am very optimistic in reaching this goal."