Biden tells asthma sufferers to 'get on Air Force One' with him the next time he goes to London so they can buy an inhaler for $49 when the same one costs $645 in the U.S.

President Joe Biden joked about using the presidential aircraft as a shortcut way to get cheaper prescription drugs that are available abroad.

Speaking at the White House about a new law that allows Medicare to negotiate with drug companies for lower costs, Biden and former presidential rival Sen. Bernie Sanders touted efforts to take on 'Big Pharma.'

Biden pointed to vast disparities for some drug costs in Canada and Europe as compared to the U.S.

'Senator Sanders has pointed out one company sells an inhaler for $49 in the United Kingdom. You know how much they charge in the United States for that one inhaler? $645 –$645,' he said.

'If you need that inhaler, you get in Air Force One the next time we go to London, you can get off and you can get it for … I'm serious. Just think about that,.

The event brought together Biden, 81, and Sanders (I-Vt.), 82, who remains a leading force on the progressive left after declining to make another presidential run of his own. 

Drug companies are charging exorbitant, exorbitant prescription drug prices, higher prices than anywhere in the world,' Biden said. 

Biden has made lowering healthcare costs a key part of his 2024 reelection campaign. Sanders, as chairman of the U.S. Senate's health committee, has already taken a series of actions - from sending letters to holding hearings - aimed at pressuring the pharmaceutical industry into lowering costs.

Biden said he wants to negotiate lower prices for 50 drugs and wants to limit drug costs for Americans, not just seniors, to $2,000 annually.

For example, the president said asthma is the most common respiratory illness, currently affecting 27 million Americans, including 4 million children. It takes less than $5 to make a dose of asthma medication; that cost hasn't changed at all, but drug companies have raised prices to eight times their original cost.

'It's time drug companies pay rebates when they increase prices faster than inflation,' Biden said.

Sanders and other lawmakers in January criticized four makers of inhalers sold in the U.S. - AstraZeneca, Boehringer, Teva Pharmaceuticals and GSK - over prices that were much higher in the United States than in other countries.

In March, three of the four companies decided to cap inhaler costs at $35 each.

'Despite all that we have accomplished up to now, it is not enough. Much, much more needs to be done,' Sanders said of lowering prescription drug costs. 'This is an issue that we must, must get a handle on.'

The Biden administration has sought to crack down on what it calls falsely claimed patents in an effort to increase competition to lower inhaler costs.

The president also highlighted successful efforts included in 2022's Inflation Reduction Act that placed a $35 cap on insulin. He also pushed to increase the number of Medicare drugs the federal government can negotiate with pharmaceutical companies from 10 to 50.

Part of 2022's Inflation Reduction Act allows Medicare to negotiate prices for prescription drugs that had been particularly expensive for the federal healthcare insurance program that covers millions of Americans aged 65 and older, as well as the disabled.

Sanders is one of three independents in the Senate but caucuses with the Democrats