Marijuana use directly affects brain function — specifically the parts of the brain responsible for memory, learning, attention, decision-making, coordination, emotions, and reaction time. 

In the short term, marijuana use (within 24 hours) in youth and adults has an immediate impact on thinking, attention, memory, coordination, movement, and time perception.

According to the Centers for Disease Control (CDC), cannabis use affects brain development. Developing brains, such as those in babies, children, and teenagers, are especially susceptible to the harmful effects of marijuana and tetrahydrocannabinol (THC).

The impact of marijuana use on the brain depends on many factors, including:

• Amount of tetrahydrocannabinol (THC) in marijuana (in other words, the concentration or strength)
• How often it is used
• Age of first use
• Whether other substances (for example, tobacco and alcohol) are used at the same time

We put together several resources below explaining the risks of marijuana and how to address misuse.

Resources