PSYCH 101 Lecture Notes - Lecture 14: Stimulant Psychosis, Drug Tolerance, Recreational Drug Use
Document Summary
If drug user takes typical high dose in unfamiliar setting, compensatory responses don"t respond as strongly leads to overdose. Drug tolerance does not always lead to significant withdrawal at typical doses. Substance dependence can occur even without tolerance or withdrawal. Physiological dependence is not the major cause of drug addiction. Reduce feelings of tension and anxiety, and produce state of relaxed euphoria. Barbiturates (sleeping pills) and tranquilizers (anti-anxiety drugs) used as sedatives and relaxants: depress the nervous system by increasing activity of inhibitory neurotransmitters (gaba) Increase neural firing and arouse the nervous system. (increase blood pressure, heart rate, and respiration) Cocaine increases activity of norepinephrine and dopamine by blocking reuptake. Produce excitation, a sense of increased muscular strength, and euphoria. Opiates (morphine, codeine, heroin) are drugs derived from opium. (pain relief, mood change: bind to and stimulate receptors normally activated by endorphins, relieve pain and cause intense euphoria. Hallucinogens (lsd) powerful mind altering drugs that produce hallucinations.
