The US Food and Drug Administration (FDA) has granted psilocybin therapy a Breakthrough Therapy designation for treating major depressive disorder (MDD). A non-profit research organization, the Usona Institute, is conducting a Phase 2 trial to explore the antidepressant properties of a single psilocybin dose in treating patients with MDD. The trial aims to enroll 80 subjects and is expected to be completed by early 2021. The FDA's Breakthrough Therapy designation is intended to accelerate the development and review of promising new treatments for serious or life-threatening conditions.