<unk> (oral) is an emergency contraceptive that is FDA approved for the prophylaxis of pregnancy following unprotected intercourse or a known or suspected contraceptive failure. To obtain optimal efficacy, the tablet should be taken as soon as possible within 72 hours of intercourse.   Common adverse reactions include menstrual bleeding, nausea, lower abdominal pain, fatigue, headache, and dizziness.
Levonorgestrel 
Etonorgestrel
Leuprolide
Etonogestrel
Norgestrel
Gestodene
Proligeston
Ritiometan