title: Low molecular weight heparins differ substantially: impact on developing biosimilar drugs.
abstract: Generic drugs are an important component for meaningful health-care reform currently being debated in the United States. Aside from defining the period of drug exclusivity, however, there is a critical need to ensure that generics of biologic medicines (biosimilars) are safe and effective. For low molecular weight heparins (LMWHs), the standard of care for management of venous thromboembolism, their complex structure and polypharmacological actions make producing a generic LMWH more challenging than a generic small molecule medicine. Because biosimilar LMWHs will be used interchangeably with their branded product, inherent variability between products could lead to important differences in potency, safety, or effectiveness, including unanticipated immune responses. Awareness of the specific problems associated with biosimilar LMWH development led to new recommendations from several expert bodies. This article discusses the implications of these differences for the production of biosimilar LMWHs and provides recommendations to address the limitations in the pending U.S. Congress legislation, a well-intentioned undertaking but one that must preserve the health and welfare of citizens who require these critical care medications.
authors: Cardiovascular Institute, Loyola University Medical Center, Maywood, Illinois 60153, USA. jwaleng@lumc.edu
authors: Jeanine M
authors: JM
authors: Walenga
authors: Craig M
authors: CM
authors: Jackson
authors: Craig M
authors: CM
authors: Kessler
mesh_terms: D000925:Anticoagulants / Q000592:standards; D000937:Antigen-Antibody Reactions; D017277:Drug Approval; D015195:Drug Design; D016568:Drugs, Generic / Q000592:standards*; D006495:Heparin, Low-Molecular-Weight / Q000737:chemistry* / Q000276:immunology / Q000592:standards / Q000627:therapeutic use; D006801:Humans; D004364:Pharmaceutical Preparations / Q000592:standards; D013810:Therapeutic Equivalency; D013923:Thromboembolism / Q000188:drug therapy; D014481:United States
chemical_list: D000925:Anticoagulants; D016568:Drugs, Generic; D006495:Heparin, Low-Molecular-Weight; D004364:Pharmaceutical Preparations