Emergency Contraceptive Pills:
Combined
• Ordinary birth control pills
• Contain estrogen and progestin
• 2 doses of  2 Preven tablets or, for other
   OCs 2, 4, or 5 pills, depending on brand
• First dose within 72 hours after intercourse
• Second dose 12 hours later
• Side effects: nausea (50%) and vomiting (20%)
Trussell et al. Women’s Health Prim Care 1998;1:55