PSYCH101 Chapter Notes - Chapter 5.3: Drug Tolerance, Recreational Drug Use, Psychological Dependence

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH101
• Professor: Richard Ennis

Document Summary

Tolerance - when repeated use of a drug results in a need for a higher dose for intended effect. Physical dependence - the need to take a drug to ward off unpleasant physical withdrawal symptoms. Psychological dependence - when addiction develops without any physical symptoms of withdrawal. Psychoactive drugs - substances that affect thinking, behaviour, perception, and emotion. Stimulants - category of drugs that speed up the nervous system, typically enhancing wakefulness and alertness. Ecstasy (3,4-methylenedioxy-n-methylamphetamine or mdma) - a drug that is typically classified as a stimulant, but also has hallucinogenic effects. Hallucinogenic drugs - substances that produce perceptual distortions. Marijuana - a drug comprising the leaves and buds of the cannabis plant that produces a combination of hallucinogenic, stimulant, and relaxing (narcotic) effects. Opiates (narcotics) - drugs such as heroin and morphine that reduce pain and induce extremely intense feelings of euphoria. Binds to endorphin receptors in the nervous system.