Description of Business	12 Months Ended
Dec. 31, 2013
Description of Business
Description of Business	A. Description of Business AMAG Pharmaceuticals, Inc., a Delaware corporation, was founded in 1981. We are a specialty pharmaceutical company that markets Feraheme® (ferumoxytol) Injection for Intravenous, or IV, use to treat iron deficiency anemia, or IDA, and MuGard® Mucoadhesive Oral Wound Rinse for the management of oral mucositis. Currently, our principal source of revenue is from the sale of Feraheme, which was approved for marketing in the U.S. in June 2009 by the U.S. Food and Drug Administration, or the FDA, for use as an IV iron replacement therapy for the treatment of IDA in adult patients with chronic kidney disease, or CKD. We began selling Feraheme in the U.S. in July 2009 through our own commercial organization, including a specialty sales force. We sell Feraheme to authorized wholesalers and specialty distributors, who in turn, sell Feraheme to healthcare providers who administer Feraheme primarily within hospitals, hematology and oncology centers, and nephrology clinics. Outside of the U.S., ferumoxytol has been granted marketing approval in Canada, Switzerland and the European Union, or EU, for use as an IV iron replacement therapy for the treatment of IDA in adult patients with CKD. The marketing authorization for Rienso in the EU is valid in the 28 EU Member States as well as in Iceland, Liechtenstein and Norway. Under our amended agreement with Takeda Pharmaceutical Company Limited, or Takeda, Takeda has an exclusive license to market and sell ferumoxytol in Canada, the EU and Switzerland, as well as certain other geographic territories. In Canada, Takeda promotes ferumoxytol under the trade name Feraheme and in the EU and Switzerland, Takeda promotes ferumoxytol under the trade name Rienso® 30mg/ml solution for Injection. On June 6, 2013, or the Acquisition Date, we entered into a License Agreement with Access Pharmaceuticals, Inc., or Access, under which we acquired the U.S. commercial rights to MuGard, or the Access License Agreement. MuGard was launched in the U.S. by Access in 2010 after receiving 510(k) clearance from the FDA. MuGard is indicated for the management of oral mucositis/stomatitis (that may be caused by radiotherapy and/or chemotherapy) and all types of oral wounds (mouth sores and injuries), including aphthous ulcers/canker sores and traumatic ulcers, such as those caused by oral surgery or ill-fitting dentures or braces. Under the Access License Agreement, we obtained an exclusive, royalty-bearing license, with the right to grant sublicenses, to certain intellectual property rights, including know-how, patents and trademarks, to use, import, offer for sale, sell, manufacture and commercialize MuGard in the U.S. and its territories, or the U.S. Territory, for the management of all diseases or conditions of the oropharyngeal cavity, including mucositis, or the MuGard Rights. Additional details regarding the Access License Agreement and the MuGard Rights can be found in Note G. We are subject to risks common to companies in the pharmaceutical industry including, but not limited to, our primary dependence on the success of Feraheme/Rienso, uncertainties related to the regulatory approval process for the broader Feraheme/Rienso indication, including limitations to our future revenues, the potential development of significant safety or drug interaction problems with respect to Feraheme/Rienso, competition in our industry, uncertainties related to potential collaborations, in-licensing arrangements or acquisition agreements, our dependence on third parties to manufacture Feraheme/Rienso and MuGard, the potential inability of our or Access' third-party manufacturers to operate their facilities in compliance with current good manufacturing practices and manufacture sufficient quantities of Feraheme/Rienso or MuGard, uncertainties related to the protection of our proprietary technology related to Feraheme, our reliance on Takeda to commercialize Feraheme/Rienso in certain territories outside of the U.S., uncertainties regarding market acceptance of Feraheme/Rienso or MuGard, our reliance on a limited number of customers for Feraheme, uncertainties related to patient insurance coverage and third-party reimbursement rates and terms for Feraheme/Rienso or MuGard, uncertainties related to the impact of current and future healthcare initiatives and legislation, our third-party manufacturers, or Access' potential inability to obtain raw or other materials, our potential inadvertent failure to comply with reporting and payment obligations under government pricing programs, our potential inability to become profitable in the future, our limited experience commercializing and distributing a pharmaceutical product, our dependence on key personnel, the potential fluctuation of our operating results, potential differences between actual future results and the estimates or assumptions used by us in preparation of our consolidated financial statements, our potential inadvertent failure to comply with the regulations of the FDA or other federal, state or foreign government agencies, the volatility of our stock price, uncertainties related to the actions of activist stockholders, potential product liability, potential legislative and regulatory changes, and potential costs and liabilities associated with pending or future litigation or patent challenges. Throughout this Annual Report on Form 10-K, AMAG Pharmaceuticals, Inc. and our consolidated subsidiaries are collectively referred to as "the Company," "we," "us," or "our."

A. Description of Business

AMAG Pharmaceuticals, Inc., a Delaware corporation, was founded in 1981. We are a specialty pharmaceutical company that markets Feraheme® (ferumoxytol) Injection for Intravenous, or IV, use to treat iron deficiency anemia, or IDA, and MuGard® Mucoadhesive Oral Wound Rinse for the management of oral mucositis.

Currently, our principal source of revenue is from the sale of Feraheme, which was approved for marketing in the U.S. in June 2009 by the U.S. Food and Drug Administration, or the FDA, for use as an IV iron replacement therapy for the treatment of IDA in adult patients with chronic kidney disease, or CKD. We began selling Feraheme in the U.S. in July 2009 through our own commercial organization, including a specialty sales force. We sell Feraheme to authorized wholesalers and specialty distributors, who in turn, sell Feraheme to healthcare providers who administer Feraheme primarily within hospitals, hematology and oncology centers, and nephrology clinics.

Outside of the U.S., ferumoxytol has been granted marketing approval in Canada, Switzerland and the European Union, or EU, for use as an IV iron replacement therapy for the treatment of IDA in adult patients with CKD. The marketing authorization for Rienso in the EU is valid in the 28 EU Member States as well as in Iceland, Liechtenstein and Norway. Under our amended agreement with Takeda Pharmaceutical Company Limited, or Takeda, Takeda has an exclusive license to market and sell ferumoxytol in Canada, the EU and Switzerland, as well as certain other geographic territories. In Canada, Takeda promotes ferumoxytol under the trade name Feraheme and in the EU and Switzerland, Takeda promotes ferumoxytol under the trade name Rienso® 30mg/ml solution for Injection.

On June 6, 2013, or the Acquisition Date, we entered into a License Agreement with Access Pharmaceuticals, Inc., or Access, under which we acquired the U.S. commercial rights to MuGard, or the Access License Agreement. MuGard was launched in the U.S. by Access in 2010 after receiving 510(k) clearance from the FDA. MuGard is indicated for the management of oral mucositis/stomatitis (that may be caused by radiotherapy and/or chemotherapy) and all types of oral wounds (mouth sores and injuries), including aphthous ulcers/canker sores and traumatic ulcers, such as those caused by oral surgery or ill-fitting dentures or braces. Under the Access License Agreement, we obtained an exclusive, royalty-bearing license, with the right to grant sublicenses, to certain intellectual property rights, including know-how, patents and trademarks, to use, import, offer for sale, sell, manufacture and commercialize MuGard in the U.S. and its territories, or the U.S. Territory, for the management of all diseases or conditions of the oropharyngeal cavity, including mucositis, or the MuGard Rights. Additional details regarding the Access License Agreement and the MuGard Rights can be found in Note G.

We are subject to risks common to companies in the pharmaceutical industry including, but not limited to, our primary dependence on the success of Feraheme/Rienso, uncertainties related to the regulatory approval process for the broader Feraheme/Rienso indication, including limitations to our future revenues, the potential development of significant safety or drug interaction problems with respect to Feraheme/Rienso, competition in our industry, uncertainties related to potential collaborations, in-licensing arrangements or acquisition agreements, our dependence on third parties to manufacture Feraheme/Rienso and MuGard, the potential inability of our or Access' third-party manufacturers to operate their facilities in compliance with current good manufacturing practices and manufacture sufficient quantities of Feraheme/Rienso or MuGard, uncertainties related to the protection of our proprietary technology related to Feraheme, our reliance on Takeda to commercialize Feraheme/Rienso in certain territories outside of the U.S., uncertainties regarding market acceptance of Feraheme/Rienso or MuGard, our reliance on a limited number of customers for Feraheme, uncertainties related to patient insurance coverage and third-party reimbursement rates and terms for Feraheme/Rienso or MuGard, uncertainties related to the impact of current and future healthcare initiatives and legislation, our third-party manufacturers, or Access' potential inability to obtain raw or other materials, our potential inadvertent failure to comply with reporting and payment obligations under government pricing programs, our potential inability to become profitable in the future, our limited experience commercializing and distributing a pharmaceutical product, our dependence on key personnel, the potential fluctuation of our operating results, potential differences between actual future results and the estimates or assumptions used by us in preparation of our consolidated financial statements, our potential inadvertent failure to comply with the regulations of the FDA or other federal, state or foreign government agencies, the volatility of our stock price, uncertainties related to the actions of activist stockholders, potential product liability, potential legislative and regulatory changes, and potential costs and liabilities associated with pending or future litigation or patent challenges.

Throughout this Annual Report on Form 10-K, AMAG Pharmaceuticals, Inc. and our consolidated subsidiaries are collectively referred to as "the Company," "we," "us," or "our."