Walgreens and CVS pharmacies in select states will begin selling the abortion pill mifepristone as soon as next week, the companies announced Friday.

Both pharmacy chains completed the Food and Drug Administration (FDA) certification process to dispense mifepristone, which is a drug that blocks the hormone progesterone needed for a pregnancy to continue. It is commonly used to end a pregnancy through ten weeks gestation, according to the FDA.

Walgreens announced the drug will only be available in select locations in New York, Pennsylvania, Massachusetts, California and Illinois.

“We are beginning a phased rollout in select locations to allow us to ensure quality, safety and privacy for our patients, providers and team members,” Walgreens said in a statement.

CVS will start dispensing mifepristone at pharmacies in Massachusetts and Rhode Island, Amy Thibault told NewsNation in a statement. A specific date was not mentioned, but Thibault said patients can expect the drug to be available “in the weeks ahead.”

“We’ve received certification to dispense mifepristone at CVS Pharmacy and plan to fill prescriptions for this medication in states where legally permissible. We’re working with manufacturers and suppliers to secure the medication and are not yet dispensing it in any of our pharmacies,” Thibault said in a statement.