Can you use Ella and hormonal birth control together?

Using Ella and hormonal birth control together can decrease the effectiveness of each, so they should not be taken at the same time. If a person wishes to start or resume hormonal contraception after the intake of Ella, they should do so no sooner than 5 days after taking Ella. Additionally, a rapid return of fertility is likely, following treatment with Ella, so a reliable barrier method should be used until the next menstrual period.