A judge has ruled in favor of a South Dakota law that helps rural healthcare providers buy discounted drugs and mark up their sale price to fill budget holes created by low Medicare and Medicaid reimbursement rates. The law, which took effect last year, blocks drug companies from restricting which pharmacies health care providers can use to access discounts through the federal 340B program. The judge also ruled that South Dakota’s law does not unfairly burden interstate commerce, in part because the state has a “legitimate interest in regulating the delivery of 340B drugs ultimately dispensed to its citizens.”