is mirena a systemic
Mirena is promoted as a remote concentration -- meaning that it only affects a SINGLE area of the body (the cervix). But this clearly says systemic, which means the ENTIRE body. LNG concentration is the amount of levonorgestrel (LNG) released by Mirena. And the excerpt from above clearly states that the concentration is 1.5 times higher in women who weigh less than 121 pounds.