New York Consolidated Laws, Public Health Law - PBH § 3304. Prohibited acts

a. It shall be unlawful for any person to manufacture, sell, prescribe, distribute, dispense, administer, possess, have under his control, abandon, or transport a controlled substance except as expressly allowed by this article.

b. It shall be unlawful for any physician practicing medicine as defined in section sixty-five hundred twenty-one of the education law to prescribe, dispense or administer any amphetamines or sympathomimetic amine drug or compound thereof, designated as a schedule II controlled substance pursuant to section thirty-three hundred six of this article for the exclusive treatment of obesity, weight control or weight loss.  A violation of the provisions of this subdivision shall not be grounds for prosecution under article two hundred twenty of the penal law.