Most drugs affect the brain's "reward circuit," causing euphoria as well as flooding it with the chemical messenger dopamine. A properly functioning reward system motivates a person to repeat behaviors needed to thrive, such as eating and spending time with loved ones. Surges of dopamine in the reward circuit cause the reinforcement of pleasurable but unhealthy behaviors like taking drugs, leading people to repeat the behavior again and again. A One Hour Journey Through the 12 Steps with Tommy Rosen
Hallucinogenic drugs. Hallucinogens are psychoactive drugs that affect the way you experience the world around you. A few of the most popular hallucinogenic drugs include Ecstasy, LSD PCP, and mushrooms. The effects of hallucinogenic drugs can range from pleasant sensory distortions and feelings of empathy to terrifying hallucinations and violent impulses. These psychedelic substances are popular among young people, many of whom are introduced to hallucinogenic drugs at clubs, raves, concerts, or parties. Although hallucinogenic drugs are commonly believed to be non-addictive, clinical research has shown that drugs like Ecstasy can cause signs of physical and psychological dependence, including withdrawal symptoms, obsessive thoughts, and cravings.
Stimulants, such as tobacco, cocaine or prescription amphetamines, stimulate the brain and nervous system, causing increased alertness. Depressants, such as barbiturates and benzodiazepines, slow activity in the brain and nervous system, causing relaxation. Hallucinogens, such as LSD and PCP, drastically disrupt the way the brain and nervous system communicate, causing hallucinations. Rehab: Last Week Tonight with John Oliver (HBO)