Can i take emergency contraceptive pill after 4 days of having unprotected sex?

Follow the morning-after pill's instructions. If you use Plan B One-Step, take one Plan B One-Step pill as soon as possible and less than 72 hours after unprotected sex. If you use ella, take one ella pill as soon as possible and less than 120 hours after unprotected sex. ref: https://www.mayoclinic.org/tests-procedures/morning-after-pill/about/pac-20394730#