"i started taking phentermine in late april, 2010.  to date i have lost 42 pounds.  i went from 223 to 181 when i weighed in yesterday at my doctor&#039;s office.  (i am 5&#039; 9&quot; tall, 54 year old female).  the health benefits have been enormous.  i no longer have sleep apnea and don&#039;t have to wear the cpap machine at night.  i no longer snore.  i was able to be weaned off my antidepressant medications and my doctor says i may even be able to eliminate my high blood pressure medications, as my blood pressure has dropped and stabilized.  i am still taking phentermine (37.5 mg).  i will add that i walk everyday, at least 3 miles, most of the time i walk more than that (at lunchtime and in the evenings).  i am working hard on my diet also."