hi your right on the edge for effectiveness being 175 pounds but please read this below its from womanshealthmag. com hra pharma the european manufacturer of the emergency contraption drug norlevo recently added a warning on its packaging that states it starts losing effectiveness for women who weigh 165 pounds or more—and that the drug isn't effective at all for women above 175 pounds. why that matters in the u. s.? norlevo is chemically identical to the one- and two-pill versions of plan b as well as its generics like next choice and my way says jessica arons president and ceo of reproductive health technologies project a birth control advocacy group. so for you its hit or miss but if you really don't need this there's always the abortion pill if you get a positive test. hope this helps you. good luck
i took plan b about 36 hours after having unprotected sex what's the likely hood of being pregnant? . also i read somewhere not to take it if you are over 165 pounds i'm 175 is this an issue as well?