Cars line up to cross into the US at the US/Canada border in Saint-Bernard-de-Lacolle, Quebec.

President Donald Trump said Friday that his administration will soon release a plan that will allow states to import cheaper prescription drugs from Canada.

"While we had the first prescription drug price decrease in 50 years, Americans still pay far too much for drugs — other countries pay far less — that is WRONG!" Trump said in a tweet. "We will soon be putting more options on the table..."

"Hard-working Americans don't deserve to pay such high prices for the drugs they need. We are fighting DAILY to make sure this HAPPENS..."

It's unclear exactly how the plan has changed since the Department of Health and Human Services released an outline in July. According to the outline, states, wholesalers and pharmacists — acting as intermediaries for consumers — would draft a proposal for safe importation of drugs already available in the U.S. The groups would then submit the proposal to the Food and Drug Administration for approval.

In most circumstances, it is illegal to import medications from other countries for personal use, according to the FDA.

Canadian health officials and the pharmaceutical industry are against the proposal.