"i have now been on phentermine for a week. i have already lost 5 lbs. i need to lose another 20. i am not obese but am on two cholesterol medications. i always weighed the same until my thyroid medication was too low and i gained 20 lbs. i could not get it off no matter what i did...until phentermine came into my life. i am experiencing none of the side effects except dry mouth. what i am experiencing though  is 1) higher energy; 2) better sleep; 3)a feeling of well being; 4) more focused; 5) less appetite; 6)more stamina. i am only on 15mg per day and feel wonderful."