The order is based on a "most favored nation" pricing model, which is similar to a policy Trump pushed in his first administration.

By Catalina Jaramillo and Kate Yandell In signing an executive order aimed at reducing U.S. drug prices, President Donald Trump said some prices would be cut in half or more “almost immediately.” But the order is light on details of how the plan would be implemented.

The executive order will tie what Medicare pays for medications administered in a doctor’s office to the lowest price paid by other countries.