PSY2061 Study Guide - Final Guide: Drug Tolerance, Drug Withdrawal, Alcohol Tolerance
4 Aug 2018
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Psychoactive drugs: drugs that influence subjective experience and behavior by acting on the nervous system. Drug administration, absorption, and penetration of the central. Once swallowed, drugs dissolve in stomach and are carried to intestine where they are absorbed into the bloodstream. Some drugs pass through the stomach wall --> takes effect sooner. Absorption from the digestive tract into the bloodstream can be greatly influenced by factors such as amount and type of food in stomach. Effects of injected drugs are strong, fast, and predictable. Intravenously: into veins, travels directly to the brain. Drugs can be absorbed into the bloodstream through the rich network of capillaries in the lungs. Difficult to precisely regulate the dose of inhaled drugs. Many substances can damage the lungs if they are inhaled chronically. Administered through the mucous membranes of nose, mouth, and rectum. Enters bloodstream, carried to blood vessels of cns.
