Washington — The Supreme Court on Thursday rejected a challenge targeting the availability of a widely used abortion pill, preserving access to the drug in its first major abortion-related ruling since the reversal of Roe v. Wade.

The unanimous ruling from the justices was on procedural grounds. They determined that a group of anti-abortion rights doctors and medical associations who brought the lawsuit against the Food and Drug Administration did not have the legal right to do so.

In finding they lacked legal standing, the Supreme Court did not address whether the FDA acted lawfully when it took a series of steps in 2016 and 2021 that relaxed the rules for the abortion drug mifepristone’s use.

“Under Article III of the Constitution, a plaintiff’s desire to make a drug less available for others does not establish standing to sue. Nor do the plaintiffs’ other standing theories suffice,” Justice Brett Kavanaugh wrote for the court. “Therefore, the plaintiffs lack standing to challenge FDA’s actions.”

The decision does not foreclose other challenges targeting mifepristone, but it means that the FDA’s recent steps that made the drug easier to obtain will remain in place. Those actions included allowing mifepristone to be taken later into a pregnancy, expanding the health care workers who can prescribe it, and lifting an in-person dispensing requirement so the pill can be sent through the mail.

The Supreme Court’s abortion pill case

The dispute brought by a group of anti-abortion rights doctors and medical associations was the first involving abortion that the Supreme Court heard in the wake of its blockbuster decision overturning Roe two years ago.

If the challengers had prevailed, the ruling would have restricted access to mifepristone nationwide, even in states where abortion is legal.

Mifepristone is taken with a second drug, misoprostol, to end an early pregnancy. Since it was first approved by the FDA in 2000, mifepristone has been taken by more than 5 million patients, and serious adverse events as a result of mifepristone are “exceedingly rare,” according to the agency. Medication abortions made up more than half of all abortions in the U.S. health care system in 2023, according to a study from the Guttmacher Institute, a pro-abortion rights research group.

But the anti-abortion rights doctors alleged in a lawsuit filed in November 2022 that the FDA didn’t have the authority to approve mifepristone for sale in the U.S. and failed to adequately consider the drug’s safety and effectiveness. The suit targeted the FDA’s 2000 approval of mifepristone and steps the agency took in 2016 and 2021 that made it more accessible.

Under those changes, mifepristone could be taken up to 10 weeks into a pregnancy, up from seven weeks; the number of in-person visits required was reduced from three to one; more health care providers could prescribe the drug; and it could be sent through the mail.

U.S. District Judge Matthew Kacsmaryk blocked the FDA’s 2000 approval of the drug and its more recent actions, finding they were likely unlawful. Left intact, the ruling would have taken mifepristone off the market. But the Supreme Court eventually maintained access to the drug while the legal proceedings continued. A federal appeals court then scaled back Kacsmaryk’s ruling, upholding the agency’s green-light of mifepristone to be sold, but concluding that the agency likely violated the law with its 2016 and 2021 changes.

That decision, from the U.S. Court of Appeals for the 5th Circuit, was preempted by the Supreme Court’s earlier order protecting the abortion drug’s wide availability. But the ruling from the justices now dissolves that stay.

While the case involved access to a key drug used in medication abortions, pharmaceutical companies and former FDA officials warned that a ruling against the drug agency would reach beyond the abortion context. Drug companies said an adverse ruling would undermine the FDA’s approval process for new medications and open the door to a slew of lawsuits challenging decisions made about drugs that have been on the market for years.

Since the Supreme Court rolled back the constitutional right to abortion, 14 states have imposed near-total bans with limited exceptions, while another seven outlaw the procedure at or before 18 weeks gestation. Fifteen states restrict access to medication abortion by requiring it to be provided by a physician, according to the Guttmacher Institute.

The Biden administration has undertaken a series of steps to expand access to medication abortion since Roe was overturned. The FDA in early 2023 finalized a rule to allow more retail pharmacies to dispense abortion pills as long as they complete a certification process. CVS and Walgreens, the nation’s two largest pharmacy chains, became certified to sell the drug, clearing the way for them to begin selling the medications.

But anti-abortion rights groups and lawmakers have mounted contrary efforts to restrict access to mifepristone. Louisiana Gov. Jeff Landry, a Republican, signed legislation in May that reclassified mifepristone and misoprostol as controlled substances and put them in the same category as opioids, depressants and others that can be addictive.