Cannabidiol has antipsychotic effects. The exact cause for these effects is not clear. But cannabidiol seems to prevent the breakdown of a chemical in the brain that affects pain, mood, and mental function. Preventing the breakdown of this chemical and increasing its levels in the blood seems to reduce psychotic symptoms associated with conditions such as schizophrenia. Cannabidiol might also block some of the psychoactive effects of delta-9-tetrahydrocannabinol (THC). Also, cannabidiol seems to reduce pain and anxiety.
But remember, it is very difficult, if not impossible, to obtain a pure CBD extract or oil from the cannabis plant. Anyone who buys a CBD oil, extract, or other CBD product should assume that it is a mixture of CBD and other cannabinoids. All other cannabinoids, including THC and the other 118 identified cannabinoids in the cannabis plant, as well as all synthetic cannabinoids, are prohibited in-competition.
In 2014, President Obama signed the Farm Bill of 2014 into law. This law contained a section that removed hemp from Schedule 1 of the Controlled Substances Act. It also created a legal structure that made cultivation and research of hemp legal in states that wanted to initiate “Pilot Research Programs” into the cultivation and marketing of hemp and hemp-derived products.
Marijuana can produce acute psychotic episodes at high doses, and several studies have linked marijuana use to increased risk for chronic psychosis in individuals with specific genetic risk factors. Research suggests that these effects are mediated by THC, and it has been suggested that CBD may mitigate these effects.xxxi There have been a few small-scale clinical trials in which patients with psychotic symptoms were treated with CBD, including case reports of patients with schizophrenia that reported conflicting results; a small case study in patients with Parkinson’s disease with psychosis, which reported positive results; and one small randomized clinical trial reporting clinical improvement in patients with schizophrenia treated with CBD.xxxii Large randomized clinical trials would be needed to fully evaluate the therapeutic potential of CBD for patients with schizophrenia and other forms of psychosis.