Oral Isotretinoin (Roaccutane) is the most effective acne treatment avaialble. 80% of patients achieve complete skin clearance after one course lasting 16-24 weeks. 20% of people- including myself- require a second course (see my pictures).
Ask your dermatologist about a second course of Isotretinoin, it is your best hope of a long term remission from acne.
Best Wishes, Loiloi.