Pfiz­er sues Am­gen in ef­fort to in­val­i­date top can­cer drug patent

Pfiz­er is su­ing Am­gen in Eu­rope over a patent is­sue, one in which both com­pa­nies have long gone back and forth.

The brouha­ha cen­ters around Am­gen’s can­cer drug Neu­las­ta, which has faced in­creas­ing biosim­i­lar com­pe­ti­tion over the years. Though the two com­pa­nies set­tled a suit in March re­gard­ing the drug’s patent, Pfiz­er sub­mit­ted a new com­plaint in a UK court Thurs­day at­tempt­ing to throw the patent out al­to­geth­er.

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