FDA Rejects Axsome’s Fibromyalgia Drug Application
Axsome Therapeutics says it will conduct another clinical trial of fibromyalgia drug AXS-14 (esreboxetine) following an FDA refusal to file letter that found its NDA was not complete enough to permit a substantive review. The letter cited one of two placebo-controlled trials included in the submission because of its flexible-dose design and eight-week primary endpoint, which was considered inadequate, according to the company.
FDA’s letter did not raise any questions relating to the positive results of the studies, both of which met their primary endpoints. “To address the FDA’s feedback, Axsome will conduct an additional controlled trial, which will use a fixed-dose paradigm,” Axsome says, adding that it will also feature a 12-week evaluation period.
Esreboxetine is described by the company as a selective norepinephrine reuptake inhibitor being developed for fibromyalgia, a chronic and often debilitating disorder marked by widespread pain, fatigue, sleep disturbances, and cognitive impairment.