BioCryst Down Despite Hereditary Angioedema Study Meets Goal

 | May 22, 2019 04:39AM ET

BioCryst Pharmaceuticals, Inc. (NASDAQ:BCRX) announced that its late-stage study on BCX7353, a novel, oral, once-daily, selective inhibitor of plasma kallikrein has met the primary endpoint. The phase III APeX-2 study evaluated BCX7353 for the prevention of hereditary angioedema (HAE) attacks for both the 110mg and 150mg dose levels with the higher dose reducing HAE attacks in patients by 44% as compared to placebo.

Shares of BioCryst plunged 52.9% despite this positive news on Tuesday as the reduction rate of HAE attacks fell below investors’ expectation. As a matter of fact, BioCryst stock has plummeted 56.9% so far this year versus the industry’s increase of 4.4%.