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An insulin pen is used to inject insulin for the treatment of diabetes. Insulin is a hormone produced by the pancreas. It is composed of an insulin cartridge (integrated or bought separately) and a dial to measure the dose, and is used with disposable pen needles to deliver the dose. It was introduced and marketed as Novopen by the Danish company Novo Nordisk in 1985. ==Types of pens== A number of companies make insulin pens including Novo Nordisk, Aventis and Eli Lilly. These companies produce pens for most of their insulins, including NovoLog/NovoRapid, Humalog, Levemir and Lantus. There are two pen systems: durable and prefilled: * A durable pen uses a replaceable insulin cartridge. When the insulin cartridge is empty, the empty cartridge is disposed of and a new one is inserted in the pen. * A prefilled pen is entirely disposable. The pen comes pre-filled with insulin, and when the insulin cartridge or reservoir is empty, the entire unit is discarded. Most brands of insulin are now available for use in pens, these include: * NovoLog, NovoRapid and Levemir by Novo Nordisk * Lantus and Apidra by Sanofi-Aventis * Humulin and Humalog by Eli Lilly and Company 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Insulin pen」の詳細全文を読む スポンサード リンク
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