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At 15, before his THC use, our middle son was happy-go-lucky, clever, handsome, and funny. Beloved by his family, with tons of friends. By 17, he became very angry and started isolating. We tried to talk to him, but he refused to engage.… Read the rest

CANNABIS USE DISORDER AND PSYCHOSIS: A DEVELOPING PROBLEM
Mounting epidemiological evidence indicates that the development of cannabis use disorder (CUD) may potentiate psychosis risk. Recent large-scale studies have shown a four-fold increase over the last two decades in the proportion of schizophrenia that can be attributable to CUD in Denmark (cited in [1, 2]) and a near tripling of CUD-associated psychosis cases in Ontario [2].… Read the rest

When my daughter was a college freshman, she was living at home, working, and taking classes toward her bachelor’s degree in psychology. She was always an artistic, extremely bright, and level-headed girl. Aside from the typical “bumps” in the road as a teenager, we enjoyed a close relationship as a family: going to church on Sundays, visiting theme parks, seeing movies, and traveling together often. All… Read the rest

Johnny’s Ambassadors two books, The Dangerous Truth About Today’s Marijuana: Johnny Stack’s Life and Death Story, and The Impact of THC on Our Children: A Parent’s Worst Nightmare are FREE on eBook from Aug. 20-24, 2025.

Read the August 19, 2025 Johnny’s Ambassadors Newsletter

… Read the rest

We have created NEW PowerPoint slides with notes on the possible harms of teen THC use. You are FREE TO USE these AS IS in your educational presentations.

We will be adding more of these over time so check back frequently.… Read the rest

A candid and intimate look at cannabis-induced psychosis through the eyes of young people who lived it, revealing the silent epidemic that’s tearing apart families, and the long path to recovery.

After a year of work, thanks to a generous donation from the Gerald and Daphna Cramer Family Foundation, Johnny’s Ambassadors documentary, Cannabis-Induced Psychosis: A Silent Epidemic is finished!… Read the rest

Please help Johnny’s Ambassadors Youth THC Prevention educate about the harms of youth THC use around the world by sharing this post! Thank you to Wyoming PBS for creating this incredible one-hour documentary featuring my son, Johnny, who died by suicide at the age of 19 after becoming psychotic from using THC.… Read the rest

Researchers into the effects of cannabis use have long assumed, based partly on apocryphal evidence and the “stoner” stereotype, that heavy users often suffer from decreased academic success. However, the association between cannabis use and academic achievement had not been systematically or rigorously tested; nor had the magnitude of any such association been fully determined.That… Read the rest

While we know cannabis use affects mental health in some ways, we still don’t understand all its impacts. Researchers have solidly established that heavy use can trigger psychosis and schizophrenia in those susceptible to it, but haven’t fully determined the association between cannabis use and subsequent depression and suicidality.… Read the rest

The Bradford Hill Analysis of Causation Applied to Cannabis Use and the Development of Chronic Psychotic Disorders as appeared in the Appendix of the book, The Impact of THC on Our Children: A Parent’s Worst Nightmare.

Written by Christine L.… Read the rest