"i&#039;m a 66-yr old female who started phentermine in august.  i lost 12lbs the first month, 6lbs the next month, then 4lbs, and this month only 1lb! just read all the blogs &amp; i&#039;m going to stop the medicine for 3-4 days then start again.  at my last dr. visit he upped my dosage to 2 tabs/day.  according to the blogs, i&#039;m taking the tab at the right times of the day and in the right way.  i have an extremely active job and am on my feet 5-1/2 hr non-stop 5 days/week; however, am getting ready to start traveling with my husband in our rv so plan to start exercising by joining curves/walking.  i&#039;m thrilled with the way my appetite has decreased, don&#039;t think so much about food, and only eat fruits and veggies with regular meal at night.  constipation is awful."