Product launch expected in the second half of July 2009

AMAG Pharmaceuticals, Inc. (NASDAQ:AMAG) today announced that the U.S. Food and Drug Administration (FDA) has granted marketing approval for Feraheme™ (ferumoxytol) Injection for intravenous (IV) use as an iron replacement therapy for the treatment of iron deficiency anemia in adult patients with chronic kidney disease. The recommended dose of Feraheme is an initial 510 mg IV injection followed by a second 510 mg IV injection three to eight days later. Feraheme should be administered as an undiluted IV injection delivered at a rate of up to 1 mL/sec (30 mg/sec). The recommended Feraheme dose may be readministered to patients with persistent or recurrent iron deficiency anemia.

Feraheme is expected to be commercially available in the U.S. during the second half of July 2009. Feraheme will be distributed primarily through wholesalers and specialty distributors. The Company will market and sell Feraheme through its commercial organization consisting of approximately 150 seasoned professionals, including an 80-person specialized sales force, an experienced account management and reimbursement team, and a contract nurse team.

“Feraheme offers patients across the continuum of chronic kidney disease, including patients not on dialysis and patients on dialysis, a new paradigm for the treatment of iron deficiency anemia,” commented Brian J.G. Pereira, MD, President and Chief Executive Officer of AMAG. “We are extremely pleased with the FDA’s approval of Feraheme, and we are well prepared and excited to bring this new treatment option to patients and physicians.”

"Iron deficiency anemia is a significant problem in patients with chronic kidney disease and is frequently underdiagnosed and undertreated,^1,2” said Bryan Becker, MD, President of the National Kidney Foundation. "We welcome the availability of a new therapy option for chronic kidney disease patients affected by iron deficiency anemia."

Clinical Data

Feraheme has been proven to be a safe and effective therapy for treating iron deficiency anemia in adult chronic kidney disease patients. The FDA approval of Feraheme was based on safety and efficacy results from four Phase III studies of patients with chronic kidney disease and iron deficiency anemia. These studies consisted of three open-label, multi-center, randomized safety and efficacy clinical studies and a fourth double-blind, multi-center, randomized, placebo-controlled cross-over safety study. Each of the three pivotal safety and efficacy studies achieved statistical significance in its primary endpoint: the mean change in hemoglobin from baseline at Day 35 after the first dose. Feraheme significantly increased hemoglobin levels as compared to oral iron across the spectrum of chronic kidney disease.