Postinor 1 is a one-time tablet that’s to be used within the first 72 hrs of unprotected sex. It is effective in preventing unwanted pregnancies in 85 percent of cases but it doesn’t prevent STDs. You shouldn’t use more than four pills in a month or it could cause disruptions in your cycle and lead to delayed or elongated periods.
Just like Postinor 1, it contains levonorgestrel progestogen. The major difference between both pills is that postinor 2 comes in two pills instead of one. The first Postinor 2 tablet should taken immediately after unprotected sex and the second 12 hours after. Postinor 2 tablets can cause serious side effects when both tablets are taken all at once.
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