PSY290H1 Chapter Notes - Chapter 15: Alcohol Withdrawal Syndrome, Drug Withdrawal, Drug Tolerance
Document Summary
Chapter 15: drug addiction and the brain"s reward circuits. Psychoactive drugs drugs that influence subjective experience and behaviour by acting on the nervous system. Drugs are often administered in four different ways: oral ingestion, absorption through the mucous membranes of the nose, mouth or rectum. Route influences the rate at which and degree to which the drug reaches the body. Once swallowed, they dissolve in the fluids of the stomach and are carried to the intestine, where they are absorbed into the bloodstream. Some drugs readily pass through the stomach wall (i. e. alcohol) and therefore have faster effects. Typically made: subcutaneously (sc), into the fatty tissue just beneath the skin. Intravenously (iv), directly into veins at points where they run just beneath the skin. Bloodstream delivers the drug directly to the brain. Some drugs can be absorbed into the bloodstream through the rich network of capillaries in the lungs.
