En español
NIDA

Marijuana

Evidence grows that heavy marijuana use may harm the brain

New NIDA-funded research shows that heavy marijuana use (at least four times per week over the past six months) is linked to adverse changes in the function and structure of brain areas associated with reward, decision making, and motivation.  Heavy marijuana use can also enhance some brain circu


Marijuana Use & Educational Outcomes

Educational outcomes include lower grades and exam scores, lower enrollment in college, and lower rates of graduation from high school and college.
English

Dr. Kevin M. Gray Q & A: A Potential Medication for Marijuana Dependence

Dr. Kevin M. Gray discusses why it’s the perfect time for discovering new evidence-based treatments for marijuana dependence. In an accompanying podcast, he discusses a clinical trial that examines NAC’s potential as a treatment for marijuana dependence among adults.

Commentary: More research needed into marijuana’s effects on brain development and function

A journal commentary by Harvard researcher and NIDA grantee Bertha K. Madras stresses the importance of a large scale longitudinal study to better assess the effects of marijuana use on human brain development and function. Dr.


Science Should Guide Marijuana Policy

In a series of recent articles, The New York Times’ editors presented a case for repealing the federal ban on marijuana, including the disproportionate impact of current marijuana laws on minorities.

Regular marijuana users may have impaired brain reward centers

New research shows that regular marijuana users show impairments in the brain’s ability to respond to dopamine – a brain chemical that is involved in reward, among other functions.


Self-Control Protects Urban Minority Youths From Drug Use and Depressive Mood

Interventions that bolster self-control in childhood and early adolescence might shield ethnic and racial minority adolescents and young adults from the burden of both drug use and depressive mood.

Study compares effectiveness of oral drug tests for recent marijuana use

A variety of oral drug testing devices are available to determine recent marijuana use. For the first time, a new NIDA study compares the ability of these devices to accurately detect specific cannabinoids – the chemical compounds found in marijuana.


Pages