I've been taking Phentermine since Dec. 5th and here is my experience.
My doc started me with half of the 37.5 once a day. I lost about 9 lbs. in Dec. Through January, I maintained. Didn't lose anything, so she upped my dose to one full 37.5 tablet daily. I have lost about 13 lbs. this month. Total 22- since Dec. I have not worked out once, but I intend to begin that soon. I have gone from a 16 to a 14.
My diet consists of grilled chicken salads, fruit (mainly berries, apples, and pineapple) sometimes a Lean Cuisine meal for dinner, an occasional Chick fil A sandwich, and every couple of days, I treat myself to a king sized Hersheys with almonds. I eat maybe once or twice a day.
I do have dry mouth, some sleepless nights, irritability, rapid heart beat (some days) an increased sex drive, and not much of an appetite.
Overall, I have been very pleased.