I would check in with your doctor as well. Weight loss is an off-label use of this drug, so changing your diet at the same time may not be a good idea, might be better to be on the drug awhile first. Also, things that alter your stomach acids may affect resorption of the drug and that can affect dosages, so I would want to work it through with my doc first. I am assuming you either have ADHD or narcolepsy, you may really enjoy the effects of the drug in enhancing concentration and giving you energy.
zen and the art of weight loss, finding the true path of en-lighten-ment