Rapastinel Phase 3 Trials Missed Endpoints

Allergan says topline results from three pivotal studies of its rapastinel as an adjunctive treatment of major depressive disorder failed to differentiate from placebo on primary and key secondary endpoints. A company statement says that in all three studies, the drug was well tolerated without any signal of psychotomimetic side effects. It also says an interim analysis of the rapastinel relapse prevention study suggests that primary and key secondary endpoints will not be met.

The trials evaluated the efficacy, safety, and tolerability of rapastinel, compared to placebo, both in combination with antidepressant therapy in patients with major depressive disorder who had a partial response to antidepressant therapy. In all three trials, Allergan says, rapastinel was well tolerated and demonstrated a safety and tolerability profile similar to placebo.

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