Health-Chem Corporation, operating through its subsidiary, Transderm Laboratories Corporation, specializes in the research, development, manufacturing, and commercialization of transdermal drug delivery systems throughout the United States. Among its key products are transdermal nitroglycerin patches, formulated to provide relief for vascular and cardiovascular symptoms linked to angina pectoris (commonly known as chest pain) via skin absorption. The company additionally offers contract research and development services to third-party clients.