Drug use commonly impacts an individual's perception of the world around them. Mind-altering drugs are substances that can influence one's mental state or social behavior. These substances can be classified as psychoactive or psychotropic drugs, which change a person's mood, thoughts, and emotions. Some of the well-known names for these substances include hallucinogens, stimulants, opioids, narcotics, and sedatives. Chemicals in mind-altering drugs interact with neurotransmitters, which in turn produce a dose-dependent effect on an individual's behavior and mood. The brain's pleasure-reward system gets triggered, causing an individual to crave continuous use. Mind-altering drugs are highly addictive, and their long-term usage is associated with psychological and physical damage.