Give Now

A Moment of Science

Teenage Marijuana Use May Lead To Psychotic Symptoms In The Future

One study found that teenage cannabis use could increase the risk of psychotic illness by forty percent.

marijuana leaves

Photo: Alexodus (Flickr)

Growing marijuana is illegal in most places.

A new cannabis research study just confirmed what many scientists suspected. Teens who use marijuana are more likely than non users to develop psychotic symptoms such as hallucinations, delusions and feelings of persecution later in life.

Recent Studies

There have been several research studies recently. One found that teen cannabis use could increase the risk of psychotic illness by forty percent.

Another study linked cannabis use to earlier onset of psychotic illness. Teens who smoke marijuana for long periods have more hallucinations and delusions.

Inside The Experiment

Researchers kept track of almost 2,000 Germans for ten years, from age 14 to 24. This time they made sure that the teens didn’t have any pre-existing psychotic symptoms and hadn’t used marijuana before. They checked the teens three times during the study to interview them about smoking marijuana and psychotic symptoms.

And they also accounted for things such as age, sex, socioeconomic status, other drug use and other psychiatric illnesses. Short term cannabis use almost doubled the risk of temporary psychotic symptoms. And those who used cannabis over the entire study period increased their risk of developing a permanent psychotic disorder.

  • Itzach Stern

    If you notice any of these signs, a drug addiction could very well be present. It’s important that these signs are not ignored and that help is sought for either you or a loved one.

    cannabis withdrawal symptoms

Stay Connected

What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically. Choose to receive some or all of the updates from A Moment of Science:

Support for Indiana Public Media Comes From

About A Moment of Science

Search A Moment of Science