(Bloomberg) -- Canada has imposed measures to limit the distribution of some drugs, a move that’s largely aimed at the U.S.

The Canadian government is putting the new guidelines in place to protect its drug supply from bulk sales across the border that could worsen the current deficit, Health Minister Patty Hajdu said in a statement. Companies will now be required to provide information to assess existing or potential shortages, and within 24 hours in serious cases.

“Our health care system is a symbol of our national identity and we are committed to defending it,” she said. “The actions we are taking today will help protect Canadians’ access to the medication they rely on.”

The measures were put in place to respond to the U.S. Importation of Prescription Drugs rule which allows licensed pharmacists or wholesalers to import in bulk certain prescription drugs intended for the Canadian market. This rule is slated to come into effect on Monday.