Biosimilar
（重定向自Biogenerics）
![The 2012–2019 patent cliff.[20] Period of market exclusivity up to date of patent expiration for the ten top-selling biologics for 2011. *Enbrel has been granted approval in 2011 for a patent filed in 1995, extending its patent life further 17 years.](/Images/godic/202412/24/Biosimilars_Patent_Cliff5048.png")
A biosimilar (also known as follow-on biologic or subsequent entry biologic) is a biologic medical product which is almost an identical copy of an original product that is manufactured by a different company. Biosimilars are officially approved versions of original "innovator" products, and can be manufactured when the original product's patent expires. Reference to the innovator product is an integral component of the approval.