‘Morning after’ pill label changed to clarify it does not cause abortion - The Washington Post

But the FDA's new guidance on its website makes it even clearer that the medication is not an abortion pill. 

"Plan B One-Step will not work if a person is already pregnant, meaning it will not affect an existing pregnancy …," it wrote. "Evidence does not support that the drug affects implantation or maintenance of a pregnancy after implantation, therefore it does not terminate a pregnancy."…

https://www.washingtonpost.com/health/2022/12/23/morning-after-pill-label-change-fda/