Did you know that for 72 hours after sex, you can take emergency contraceptive pills to avoid becoming pregnant? AND for 5 to 7 days after sex, you can have an IUD put in, so you won’t become pregnant? Not all clinicians know about this. If you want more information or would like the phone numbers of clinicians near you that prescribe emergency birth control, call the toll-free number: (1-888) NOT-2-LATE or (1-800) 584-9911. Some of these sources of help are free. PLAN B is the emergency contraceptive pill that causes the least nausea, the least vomiting, and has the lowest failure rate.