Published Jun 22, 2026, 1:23 PM ET · Updated 5 months ago · 1 source

Psychedelic Drugmaker Definium Surges on Depression Drug Success

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Psychedelic Drugmaker Definium Surges on Depression Drug Success

Definium Therapeutics Inc. shares rally as much as 60% Monday after late-stage trial data showed “groundbreaking” results in the psychedelic drug developer’s experimental treatment for major depressive disorders.