Ecee 2 Tabs 2'sECee2 also known as E2 contains the active ingredient levonorgestrel. It is commonly known as the morning after pill, is used only as an emergency contraceptive. It is used to prevent pregnancy when taken within 72 hours (3 days) of unprotected intercourse or contraceptive failure. It can be used: After a sexual assault or rape When a condom breaks or a diaphragm slips out of place When a woman forgets to take birth control pills When you have sex and