If you need emergency contraceptives, Plan B and Take Action work best when taken within 72 hours of unprotected sex. Still, Planned Parenthood noted that you could also take it as long as 120 hours after unprotected sex with lesser results. Both pills contain levonorgestrel as their active ingredient (via Difference Between). Take Action is a generic brand of Plan B. The former is a one-pill dose with a higher concentration of the active ingredient, while the latter can come in two pill or one pill formulations. They're available over-the-counter, but Difference Between noted that Plan B might be easier to find. According to Very Well Health, Take Action costs about 20% less than Plan B, and the publication recommended possibly keeping some on hand.
Scientists believe that these types of pills work by preventing ovulation if you haven't already ovulated, or they help keep the sperm and egg from meeting to form a pregnancy. Regardless of which one you choose, the sooner you take it after unprotected sex, the better. If you have any questions, talk to your doctor about which medication would work best for you.
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