** 1. Duromine [phentermine] is controversial diet supplement prescribed for obese patients [recommended for short term weight loss] and although FDA approved it has to be taken under direct supervision of doctor because of numerous side effects. 2. most common side effects reported by patient while on duromine are mood swings, dry mouth,loss of hairs,skin rashes and although phentermine does not cause acne but common causes which can provoke acne during drug therapy with Phentermine are: Diet,Stress and Hormone Imbalance 3. While on phentermine person eats less [and not balanced diet] which is a form of stress and in stress conditions body release stress hormone which causes acne and also lack of physical exercise also contribute to the same since person go the gym once a week and workout till exhaustion causing sharp release of testosterone and causing acne . 4. To cure acne while on phentermine, doctor usually prescribe antibiotic, antiseptics, and hormonal pills and because phentermine has many drug interactions thus only your attending doctor can choose proper drugs