"Norethindrone and levonorgestrel are a progesterone-like products contained in some combination oral contraceptives. Both are linked to thrombosis (blood clots) and increased fibrin levels in the blood. These drugs are linked to hypercoagulation. And both have been found to raise the risk of developing MS 57%. Please share---although it is not discussed, there is a vascular connection to MS. Blood matters."


Multiple Sclerosis Risk Tied to Some OCs
www.medpagetoday.com
BOSTON -- Women using combined oral contraceptives containing norethindrone or levonorgestrel were substantially more likely to develop multiple sclerosis than those not on The Pill.