The Supreme Court temporarily extended women's access to an abortion pill until Friday while the justices consider whether to allow restrictions on mifepristone to take effect as a legal challenge to the medication's FDA approval continues.
In an order signed by Justice Samuel Alito on Wednesday, the court indicated it will act by Friday night.
The drug first won FDA approval in 2000, and conditions on its use have been loosened in recent years, including making it available by mail in states that allow access.
The Biden administration and New York-based Danco Laboratories, the maker of the drug, want the nation's highest court to reject limits on mifepristone's use imposed by lower courts, at least while the legal case makes its way through the courts.
Alliance Defending Freedom, representing anti-abortion doctors and medical groups in a challenge to the drug, is defending the rulings in calling on the Supreme Court to let the restrictions take effect now.
The legal fight over abortion comes less than a year after conservative justices reversed Roe v. Wade and allowed more than a dozen states to effectively ban abortion outright.
Even as the abortion landscape changed dramatically in several states, abortion opponents set their sights on medication abortions, which make up more than half of all abortions in the United States.
The abortion opponents filed suit in November in Amarillo, Texas. The legal challenge quickly reached the Supreme Court after a federal judge issued a ruling on April 7 that would revoke FDA approval of mifepristone, one of two drugs used in medication abortions.
Less than a week later, a federal appeals court modified the ruling so that mifepristone would remain available while the case continues, but with limits. The appeals court said that the drug can't be mailed or dispensed as a generic medication and that patients who seek it need to make three in-person visits with a doctor, among other things.
The generic version of mifepristone makes up two-thirds of the supply in the United States, its manufacturer, Las Vegas-based GenBioPro Inc., wrote in a court filing that underscored the perils of allowing the restrictions to be put into effect.
The court also said the drug should only be approved through seven weeks of pregnancy for now, even though the FDA since 2016 has endorsed its use through 10 weeks of pregnancy.
Complicating the situation, a federal judge in Washington has ordered the FDA to preserve access to mifepristone under the current rules in 17 Democratic-led states and the District of Columbia that filed a separate lawsuit.
The Biden administration has said the rulings conflict and create an untenable situation for the FDA.
In an order issued last Friday by Justice Samuel Alito, the court put the restrictions on hold through Wednesday to give the court time to consider the emergency appeal.