Effects of Cannabidiol (CBD) Versus Placebo as an Adjunct to Treatment in Early Psychosis

This study tests whether cannabidiol (CBD), a non-intoxicating compound from cannabis, can improve thinking, mood, or overall wellbeing when added to existing treatment for people in the early stages of psychosis (a condition involving breaks from reality such as hallucinations or delusions). **You may be eligible if...** - You have had your first episode of psychosis within the last 2 years, or you have early warning signs of psychosis (attenuated psychosis syndrome) - Your symptoms have been stable for at least 2 months - You have mild to moderate positive symptoms (e.g., not severely psychotic) - You have been on the same medication or treatment plan for at least 4–6 weeks **You may NOT be eligible if...** - You have another neurological or medical illness - You have a significant history of head injury - Your IQ is below 80 - You have a high risk of suicide - You are currently using cannabis or other substances Talk to your doctor to see if this trial is right for you.