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Axsome Therapeutics Announces Topline Results of PARADIGM Phase 3 Proof-of-Concept Trial of Solriamfetol in Major Depressive Disorder (MDD) with and without Excessive Daytime Sleepiness (EDS)
Results support continued development in MDD with concomitant EDS; Phase 3 trial planned in 2025 Approximately 50 percent of MDD patients experience EDS1,
About this update from Axsome Therapeutics, Inc.
[{"type":"text","content":"Results support continued development in MDD with concomitant EDS; Phase 3 trial planned in 2025 Approximately 50 percent of MDD patients experience EDS1, highlighting high unmet need NEW YORK, April 01, 2025 (GLOBE NEWSWIRE) -- Axsome Therapeutics, Inc. (NASDAQ: AXSM), a biopharmaceutical company leading a new era in the treatment of central nervous system (CNS) disorders, today announced results of the PARADIGM Phase 3 proof-of-concept trial of solriamfetol in major depressive disorder (MDD) with and without severe excessive daytime sleepiness (EDS). In the overall patient population, the study did not demonstrate a statistically significant change on the Montgomery-Åsberg Depression Rating Scale (MADRS) total score compared to placebo, the study’s primary endpoint. In the prespecified subgroup of patients with severe EDS, treatment with solriamfetol resulted in greater improvements in depressive symptoms compared to placebo. The study was not powered to demonstrate statistical significance in the prespecified subgroups. Based on the results in the EDS subgroup, Axsome plans to initiate a Phase 3 trial in MDD patients with EDS in 2025. The PARADIGM study was a 6-week, randomized, double-blind, placebo-controlled, multicenter, U.S. trial, in which MDD patients with severe EDS (n=51) and without severe EDS (n=295) were randomized to treatment with solriamfetol 300 mg or placebo. EDS was assessed using the Epworth Sleepiness Scale (ESS). In MDD patients with severe EDS (ESS score ≥16), solriamfetol treatment resulted in clinically meaningful and numerically greater improvements compared to placebo on multiple efficacy measures including MADRS total score, MADRS anhedonia subscale, MADRS remission (total score ≤10), Clinical Global Impression of Severity (CGI-S), Clinical Global Impression of Improvement (CGI-I), and Patient Global Impression of Improvement (PGI-I), at Week 6. In patients without severe EDS, there was no meaningful difference as compared to placebo on the study endpoints. EDS is a common symptom in patients with MDD and has a reported prevalence of approximately 50% in this patient population.1 With EDS, patients have difficulty maintaining wakefulness, and have an increased propensity to fall asleep throughout the day, even in inappropriate circumstances, resulting in impairment of activities of daily living and ...