The Food and Drug Administration on Thursday authorized Merck's COVID-19 pill for certain adults.
The authorization is limited to adults who have a high risk of severe illness and for whom alternative FDA-authorized treatment options are not accessible or medically appropriate.
This is the second COVID-19 treatment in pill form after Pfizer's pills were authorized Wednesday.
This is a developing story. Please check back for updates.
ABC News' Sony Salzman contributed to this report.