A new study by the journal Lancet Psychiatry suggests that those who use marijuana every day or those who use marijuana with a high THC concentration are at increased risk for developing a psychotic disorder.

“The regular use of any kind of psychotropic agent is going to increase the risk of this psychosis getting even more dangerous,” says News 12’s Dr. Derrick DeSilva.

Researchers at King’s College in London performed the study. According to the research, “Cannabis use is associated with increased risk of later psychotic disorder but whether it affects incidence of the disorder remains unclear.”

“It will affect certain centers of the brain that will interfere with the way you react and respond,” DeSilva says. “And also cognitive function.”

Symptoms of psychosis may include hallucination and delusion and also heart problems.

But New Jersey’s most outspoken cannabis advocate says that he is skeptical of the study. Ed “NJ Weedman” Forchion says that he has been using marijuana for 35 years.

“I’ve never had any mental issues over it. In fact, if anything, it’s helped any issues I’ve had,” Forchion says. “I think I’m a much more pleasant person to deal with. I don’t have as open anger issues.”

New Jersey lawmakers are getting closer to approving legislation to legalize recreational use of marijuana for adults. A vote is expected to take place on March 25.