Marijuana use impairs short-term memory and judgment and distorts one's perception.
Many people use Valium and other benzodiazepines, which account for twenty percent of the total number of prescriptions that are written for controlled substances in the United States each year.
Mixing prescription drugs with alcohol may lead to respiratory depression, coma, and death.
Studies indicate that repeated recreational users of Ecstasy have increased rates of depression and anxiety, even after quitting Ecstasy.