First dose within 72 hours after unprotected intercourse followed by second dose 12 hours later
May be given up to 120 hours later (but efficacy reduced)
Reduces risk of pregnancy by 75% (2% with vs 8% without)
Nausea (50%)
Vomiting (20%)
No teratogenic effect
Pregnancy
Ovral, Ogestrel - 2 pills (100 ug ethiny estradiol/0.5mg levonorgestrel) per dose; repeat in 12h
Alesse, Aviane, Levlite - 5 pills (100 ug ethiny estradiol/0.5mg levonorgestrel) per dose; repeat in 12h
Levlen, Levora, Lo/Ovral, Low-Ogestrel - 4 pills (120 ug ethiny estradiol/0.6mg levonorgestrel) per dose; repeat in 12h
Triphasil, Tri-Levlen, Trivora - 4 pills (120 ug ethiny estradiol/0.5mg levonorgestrel) per dose; repeat in 12h
Emergency contraception
Levonorgestrel
Misoprostol
Resuscitative hysterotomy
Betamethasone
Expedited partner therapy
Pelvic ultrasound 
Against medical advice