"i started phentermine 30 mcg on friday, may 20, 2016.  although i was prescribed 2 pills a day, i only take one because i hate not being able to sleep at night. the first night i only got three hours sleep (but was not tired the next day).  in 6 days i went from 171 to 164.  i have limited my food intake but i haven&#039;t exercised (aside from weedwacking the yard).  i do take one generic tylenol pm before bed so i can sleep.  i have a dry mouth, but it isn&#039;t bad.  i am calm and focused so overall, it is a pretty good experience so far.  i am a 53 year old female with a thyroid that doesn&#039;t function very well and i&#039;m 5&#039;2&quot;.  i had a hip replacement last year and i need to lose weight because each pound i gain is 3 pounds of pressure on new hip."