Postinor is an emergency contraceptive that can be used within 72 hours (3 days) after unprotected sex or if your usual birth control method failed.
Take one tablet as soon as possible after unprotected sex, preferably within 12 hours and no later than 72 hours (3 days).
Swallow the tablet whole with water; do not chew it.
Postinor is for emergency use only, not as a regular birth control method, and it is not recommended to use it more than once in the same menstrual cycle.