U.S. President Donald Trump plans to sign an executive order on prescription drug pricing on Monday that aims to align the United States with what other countries pay, a move he said on social media would be a cut of 59%.

The order Trump is promising will direct the Department of Health and Human Services to tie what Medicare pays for medications administrated in a doctor’s office to the lowest price paid by other countries.

U.S. President Donald Trump on Sunday night said he will sign an executive order to reduce drug prices in the United States by between 30% and 80% with the aim of equalizing global prices.