Tonix Shuts Down Depression Drug Development

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Tonix Pharmaceuticals is discontinuing the development program for major depressive disorder candidate TNX-601 ER based on disappointing efficacy results from the company’s Phase 2 UPLIFT study. “The primary efficacy endpoint of change from baseline in depression severity, as measured by the Montgomery-Åsberg Depression Rating Scale (MADRS) total score, did not achieve clinical or statistical significance,” the company says.

In the study, TNX-601 ER was orally administered as monotherapy once a day to 132 patients with moderate-to-severe depression with a duration for the current major depressive episode of at least 12 weeks, according to the company. It says the primary efficacy endpoint was mean change from baseline in the MADRS total score at Week 6. Key secondary efficacy endpoints include the Clinical Global Impression - Severity Scale (CGI-S) and the Sheehan Disability Scale (SDS).

TNX-601 ER (tianeptine hemioxalate extended-release tablets) is described as a novel oral formulation of tianeptine designed for once-daily daytime dosing in development as a candidate for the treatment of MDD, Tonix says. “Tianeptine sodium (amorphous) immediate release (dosed 3 times daily) was first marketed for depression in France in 1989 and has been available for decades in Europe, Russia, Asia, and Latin America for the treatment of depression,” it says.

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