You should follow your doctor's advice. All Phentermine based drugs including Duromine are typically restricted to an upper bound of 12 weeks usage (although controversial) . You should use Duromine to control your overweight but you should not rely just on it to reach your goal, an old but precious advice is that you should try and change your eating habits by eating healthier and try and be more active in your physical life. Weight is almost always gained during a long period of time and so it must be lost. This way has a more lasting result and can be reached with some patience and determination. I saw many who did lose weight but they just gained back as soon as they stop taking diet pills (a.o. Duromine). Go for long term results. You can do it too :)

See full  Duromine diet pill review here