Yes, this regime of emergency contraception is known as YUTZPE'S REGIME and it's equally effective as plan-b or even ipill. It involves 4 pills of levonorgestrel stat and then again after 12 hours, bleeding should be expected in next 7 days. the pack should be discarded and not used in this cycle anymore. A fresh pack may be started at / after the onset of menses, once pregnancy is ruled out.
I hope I have answered your query,
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