The Supreme Court on Monday restored nationwide access to a widely used abortion medication in a temporary order that will, for now, allow women to once again obtain the pill mifepristone by mail.

In a brief order, Justice Samuel A. Alito Jr. paused a lower-court ruling from Friday that had prevented abortion providers from prescribing the pills by telemedicine and shipping them to patients, causing confusion for providers and patients. The one-sentence order imposes a pause until at least May 11. He requested that the parties file briefs by Thursday, and then the full court will determine how to proceed.

The state of Louisiana sued the Food and Drug Administration to restrict access to mifepristone, saying the availability of the medication by mail has allowed abortions to continue in the state despite its near-total ban on the procedure.

Medication is now the method used in nearly two-thirds of abortions in the United States, and is typically delivered in the form of a two-drug regimen through the first 12 weeks of pregnancy.

Friday’s ruling from the conservative U.S. Court of Appeals for the Fifth Circuit temporarily reinstated an F.D.A. requirement that patients visit medical providers in person to obtain mifepristone while the litigation continues. That rule was first lifted in 2021.

Two manufacturers of mifepristone, Danco Laboratories and GenBioPro, on Saturday asked the Supreme Court to intervene. In court filings, they said the Fifth Circuit ruling would cause chaos for providers and patients — and upend a major avenue for abortion access across the country. About one-fourth of abortions in the United States are now provided through telemedicine.

The Trump administration has defended the F.D.A. in court, but has not said whether it supports keeping in place the regulations that make it easier for women to obtain the pills. The F.D.A. is conducting a review of mifepristone, and the administration had asked the lower court to put the litigation on hold until that review is complete.

The case over access to the abortion pill puts the Trump administration in an awkward political position in the lead up to the midterm elections because many of President Trump’s allies and supporters oppose abortion. A spokesman for the Department of Health and Human Services, which oversees the F.D.A., declined to comment on Saturday, citing the “ongoing litigation.”

After the Supreme Court’s decision in 2022 to eliminate the nationwide right to abortion, Republican-led states like Louisiana imposed strict bans. In response, many Democratic-led states passed shield laws that protect abortion providers who prescribe pills by telemedicine and send them to patients in states with abortion bans.

Louisiana and abortion opponents have asserted in court that the F.D.A.’s decision to allow abortion pills to be available by mail posed safety risks to women and increased health care costs for states that had banned abortion.

Major medical organizations and supporters of reproductive rights have pointed to more than 100 studies that have found the pills to be safe and effective, with serious side effects rare.