Ionis (IONS) Stock Falls Despite Positive Inotersen Data

 | May 16, 2017 05:57AM ET

Ionis Pharmaceuticals, Inc. (NASDAQ:IONS) announced that the phase III study NEURO-TTR on inotersen (IONIS-TTRRx) in patients with familial amyloid polyneuropathy (FAP) met both primary endpoints.

Inotersen is potentially a first-in-class and best-in-class candidate being developed for the treatment of all forms of transthyretin, or TTR, amyloidosis.

The 15 months study demonstrated that the patients who were treated with inotersen experienced a significant benefit compared with placebo in the modified Neuropathy Impairment Score. The study met both primary endpoints and statistically significant differences were also observed at both end points.

Despite meeting the primary endpoints, the shares of the company declined by about 6.75%. This is because the data from the study made the investors anxious about the drug’s safety. Notably, Ionis’ share price has decreased 8.2% year to date against the Zacks classified Medical-Drugs industry’s gain of 7.2%.