A new study published this week helps illuminate the psychiatric effects of cannabis.
The research, which was published by The Lancet Psychiatry, found that “the acute administration of THC induces positive, negative, and other symptoms associated with schizophrenia and other mental disorders in healthy adults with large effect sizes.” As reported by CNN, the researchers concluded that “a single dose of the main psychoactive ingredient (THC) in cannabis — equal to one joint — in otherwise healthy people, can temporarily induce psychiatric symptoms, including those associated with schizophrenia.”
“The first takeaway is that for people in general there is a risk, even if you are healthy and taking a single dose, a one-off, you could have these symptoms,” said Oliver Howes, one of the study’s authors, as quoted by CNN.
“They are distressing and could affect your thinking. You might not behave in a safe or rational way. It’s not just something that’s going to affect people with a history of mental health problems,” added Howes, who is a molecular psychiatry professor at King’s College London’s Institute of Psychiatry, Psychology & Neuroscience.
Howe and his colleagues researched 15 studies involving 331 “healthy” people who received both THC and placebo. He