"i used this after a condom split- was very worried as i was a week away from my period! ordered this and took it about 1 and 1/2 to  two hours after sex. period came on time and i&#039;m not pregnant. please don&#039;t worry- i stressed myself out loads but if you took it within about 8 hours the chance of you being pregnant is absolutely miniscule. no side effects for me!"