PCP use may alter mood states in an unpredictable fashion, causing some individuals to become detached, and others to become animated.
Studies have shown that individuals struggling with drug addiction often suffer from other health problems, including mental health issues and even occupational, legal, familial, and social problems; issues which should be addressed concurrent to any treatment when the individual is taking part in a drug rehab program.
Many athletes throughout the world illegally use anabolic steroids in order to have an edge on the competition.
Individuals who abuse drugs may be more vulnerable to infection, and both drug effects and withdrawal symptoms may mask the need for urgent treatment for another condition.