"i started taking phentermine a week ago.  i started off with just half a pill for 3 days then took the 37.5 mg. just wanted my body to adjust to the new medication. i have lost 8 pounds in one week. from 172 to 164. i also am doing a low carb diet and eating 3 meals a day.  the only side effect i have is dry mouth but drinking more water helps with weight loss. i would definitely recommend this pill."