Substance abuse involves using harmful, often illegal substances, that give you a high or other intensely pleasurable feelings. There are numerous substances you could use, with the most well-known including:
Marijuana
Ecstasy
Heroin
Cocaine
Amphetamines
PCP
Glue
Prescription opioids
Tobacco and alcohol are the most common sources of substance abuse, and because they’re legal across the United States, they account for the majority of health problems associated with substance abuse.