WASHINGTON - The Supreme Court on Friday preserved women’s access to a drug used in the most common method of abortion, rejecting lower-court restrictions while a lawsuit continues.

The justices granted emergency requests from the Biden administration and New York-based Danco Laboratories, maker of the drug mifepristone. They are appealing a lower-court ruling that would roll back Food and Drug Administration approval of mifepristone.

The drug has been approved for use in the U.S. since 2000 and more than 5 million people have used it. Mifepristone is used in combination with a second drug, misoprostol, in more than half of all abortions in the U.S.

The court’s action Friday almost certainly will leave access to mifepristone unchanged at least into next year, as appeals play out, including a potential appeal to the high court.

Justices Samuel Alito, the author of last year’s decision overturning Roe v. Wade, and Clarence Thomas voted to allow restrictions to take effect. No other justices commented.

President Joe Biden praised the high court for keeping mifepristone available while the court fight continues.

“The stakes could not be higher for women across America. I will continue to fight politically-driven attacks on women’s health. But let’s be clear - the American people must continue to use their vote as their voice, and elect a Congress who will pass a law restoring the protections of Roe v. Wade,” Biden said in a statement.

The justices weighed arguments that allowing restrictions contained in lower-court rulings to take effect would severely disrupt the availability of mifepristone.

The Supreme Court had initially said it would decide by Wednesday whether the restrictions could take effect while the case continues. A one-sentence order signed by Alito on Wednesday gave the justices two additional days, without explanation.

The challenge to mifepristone, brought by abortion foes, is the first abortion controversy to reach the nation’s highest court since its conservative majority overturned Roe v. Wade 10 months ago and allowed more than a dozen states to effectively ban abortion outright.

In his majority opinion last June, Alito said one reason for overturning Roe was to remove federal courts from the abortion fight. “It is time to heed the Constitution and return the issue of abortion to the people’s elected representatives,” he wrote.

But even with their court victory, abortion opponents returned to federal court with a new target: medication abortions, which make up more than half of all abortions in the United States.

Women seeking to end their pregnancies in the first 10 weeks without more invasive surgical abortion can take mifepristone, along with misoprostol.