FERUMOXYTOL treats low levels of iron in your body (iron deficiency anemia). Iron is a mineral that plays an important role in making red blood cells, which carry oxygen from your lungs to the rest of your body. Get Ferumoxytol for as low as $237.65, which is 77% off the average retail price of $1,052.45 for the most common version, by using a GoodRx coupon.