Department of Alcohol and Drug Prevention and Education - Marijuana Information

Brain

Marijuana accumulates in the microscopic spaces between nerve cells in the brain called "synapses." This interferes with brain function by slowing or impairing transfer of critical information. Marijuana also affects the pituitary gland, which regulates hunger, thirst, blood pressure, sexual behavior, and release of sex hormones.

Lungs and Respiratory System

Marijuana can significantly damage the air sacs of the lungs, reducing the lungs' ability to bring in oxygen and remove carbon dioxide. It can also cause inflammation of the bronchial tubes and result in increased mucus production. Marijuana smoke has twice as much "tar" as cigarette smoke and significantly increases the chance of lung cancer.

Circulatory System

Marijuana speeds up the heartbeat as much as 50%, increases blood pressure, and poses great risk to those with hypertension and heart disease.

Nervous System

Marijuana distorts thinking and perceptions of reality. It makes it difficult to form concepts and thoughts. Marijuana can also cause aggression and loss of motivation.

Reproductive System

In males, marijuana use can decrease sperm count and motility, cause sperm degeneration, and lower sex drive. In females, it can cause egg damage, suppression of ovulation, disruption of menstrual cycles, and alteration of hormone levels.