In the workplace, Americans in the north central region of the United States have the highest prevalence of heavy alcohol use (8.8%).
As cocaine passes through many hands from the importer to the user, it is usually diluted ("cut" or "stepped on") at each stage of distribution from about 95% pure to as little as 1% pure in some cases.
Hashish users can become sensitive to their surroundings where they experience a more vivid sense of taste, sight, smell and hearing.
Drinking alcohol in excess can result in risky sexual behaviors, including unprotected sex, sex with multiple partners, and increased risk of sexual assault. These behaviors can result in unintended pregnancy or sexually transmitted diseases.
As of 2010, 1.0% of 12th graders had used PCP at least once in the year prior to being surveyed.