"today has marked my one month of taking the phentermine. only side effect i have had so far is dry mouth and a hot flash about 30 minutes after taking the medicine. i have gone from 204lbs to 184lbs. i still eat what i want just no sweets and only water combined with 25 mins of elliptical and 20 minutes of treadmill at 3 speed at least 3 times a week. i have lost 3 inches off my waist but i&#039;m hip measurements are still the same and i lost 2 inches combined off my thighs. love this medicine."