Levonorgestrel
"The condom broke. We ran out and got Plan B One Step less than 2 hours later. After I took it I had some cramping, headache, dizziness and the urge to urinate more than normal. I must say, this pill is a lifesaver! I did not experience spotting like some people mentioned, but I did get my period one week later. It was actually right on schedule, no delay at all. I'm thankful that us women we have this option out there. I'm so glad I took it right away like it recommends. It works!"