Incannex Announces Positive Topline Results from Phase 2 Psi-GAD1 Clinical Trial of Psilocybin in Generalised Anxiety Disorder

Highlights:

• PsiGAD1 trial achieves primary endpoint; PsiGAD psilocybin-assisted therapy demonstrated a statistically significant HAM-A reduction of 12.8 points from baseline, representing a 9.2-point improvement over psychotherapy with placebo (p <0.0001), exceeding the company’s expectations.
• 44% of patients in the psilocybin group demonstrated at least 50% reduction in anxiety score and 27% of patients showed disease remission– a remission rate more than 5 times higher than that of therapy with placebo.
• Newly developed and formulated PSX-001 psilocybin drug product has been finalised - cGMP manufacture for clinical trial supply underway.
• Incannex to submit an Investigational New Drug (IND) application with U.S. Food and Drug Administration (FDA) to proceed to a multi-site Phase 2B trial.

MELBOURNE, Australia and NEW YORK, Feb. 28, 2024 (GLOBE NEWSWIRE) -- Incannex Healthcare Inc. (Nasdaq: IXHL), (Incannex or the Company), a leading cannabinoid and psychedelic medicine biotechnology company, is pleased to announce positive topline results from its Phase 2 Psi-GAD1 clinical trial of psilocybin in generalised anxiety disorder (GAD). The trial met its primary endpoint, demonstrating a large clinical effect in the psilocybin treatment group over the placebo group.

The trial protocol and treatment design were developed in partnership with the Clinical Psychedelic Lab at Monash University, led by Dr Paul Liknaitzky.

The reduction in HAM-A score from baseline in the psilocybin group was 12.8 points, from 29.5 at baseline to 16.8 at week 11 (6 weeks following the final dosing session), representing a decrease of 9.2 points over the placebo group (-12.8 psilocybin vs. -3.6 placebo; p<0.0001). 44% of patients in the psilocybin group showed a clinically meaningful improvement of at least 50% reduction in anxiety score from baseline; a ‘response rate’ more than four times higher than that of the placebo group. 27% of patients in the psilocybin group achieved full disease remission; a rate more than five times higher than that of psychotherapy with placebo.

Psilocybin within the context of PsiGAD psychotherapy was observed to be well-tolerated, with only mild and moderate adverse events (AEs) reported. The reported AEs were consistent with the known effects of the drug. No serious or severe adverse events were observed. Only one person of the 73 participants withdrew from the trial during the 7-week treatment program.