New research published in The Lancet details an association between high cannabis potency — or concentration of tetrahydrocannabinol (THC) — and an increased risk of psychosis and cannabis use ...

Alara Bedka was 15 years old the summer she broke a promise she had made to herself. She had grown up in a home shaped by addiction. She had family members who struggled with alcohol, opioids and pot ...

The high-potency cannabis that is now widely available may raise the risk of both psychosis and addiction, a report published Monday in The Lancet Psychiatry finds. Limited time: Save 25% on NBC News ...

A study published in Molecular Psychiatry is the first to suggest that the use of high-potency cannabis leaves a distinct mark on DNA, providing valuable insights into the biological impact of ...

Ten years ago, the average gram of meth available in the U.S. was 39 percent pure. Today, it is being sold in a nearly pure state, manufactured in Mexican “superlabs” and smuggled across the border to ...

Higher concentrations of tetrahydrocannabinol or THC – the part of the marijuana plant that makes you high – are causing more people to become addicted in many parts of the world, a new review of ...