Amgen's new Horizon products bolster top line despite continued Tepezza struggles

Much of the boost can be attributed to sales of products acquired in Amgen’s $27.8 billion buyout of Horizon Therapeutics, which was completed early in the fourth quarter of last year. Assets brought by Horizon accounted for sales of $914 million, a 10% increase on the $832 million the rare disease specialist generated in the first quarter of last year.  

The big gainers from Horizon were gout treatment Krystexxa, which was up 26% to $235 million, and neuromyelitis optica spectrum disorder drug Uplizna, which saw an increase of 48% year over year to $80 million.