About this trial
This Phase 2a clinical trial is an open-label, single-group, within-subjects pilot study designed to evaluate the safety, feasibility, and preliminary efficacy of psilocybin as a therapeutic intervention for adults with developmental stuttering. This pilot study will assess whether further research to explore the potential benefits of psilocybin-assisted therapy for improving clinical outcomes in individuals who stutter, is warranted. The aims of this study include:
* Aim 1: Assess the safety and feasibility of psilocybin as a therapeutic agent for stuttering. * Aim 2: Evaluate the effects of psilocybin on objective and subjective measures of stuttering severity, struggle, and well-being. * Aim 3: Explore the therapeutic neural mechanisms of psilocybin in stuttering.
Eligibility criteria
Qualifiers
Are able to provide voluntary informed consent
Are able to read, speak, and understand English, as documented during the informed consent process.
Are 18 to 50 years old, inclusive, at Screening visit.
Have diagnosis of mild-moderate to severe stuttering based on either the SSI-4 or OASES; also confirmed stuttering by stuttering specialist.
Disqualifiers
Pregnancy or lactation.
Seizure disorder
Significantly impaired liver function, defined as 1) alanine aminotransferase (ALT) and/or aspartate aminotransferase (AST) > 5 × upper limit of normal (ULN); 2) ALT or AST > 3 × ULN with concomitant total bilirubin > 2.0 × ULN; or 3) ALT or AST ≥ 3 × ULN with the appearance of fatigue, nausea, vomiting, right upper quadrant pain or tenderness, fever, rash, and/or eosinophilia.
Cardiovascular disease including coronary artery disease, angina, history of arrhythmia (unless a successful ablation has been performed), heart failure, history of heart valve replacement, and history of cerebrovascular accident or transient ischemic attack.
Trial design
Treatments tested in this trial
- Psilocybin
- Speech therapy