Pfizer Inc. is launching a biosimilar version of Amgen Inc.'s granulocyte colony stimulating factor Neupogen (filgrastim) in the US at an aggressive discount to the brand and other cheaper versions of the drug. The company announced its biosimilar Nivestym (filgrastim-aafi) is available on the market as of Oct. 1.
Nivestym, approved by the FDA in July, joins a crowded filgrastim market that already includes two copycat products, so it...







