Psychoactive drugs (2)

Psychiatry

Psychoactive drugs are categorized based on their common effects, chemical structure, and addiction liability. The document details specific classes including stimulants, depressants (sedative-hypnotics), narcotics (opiates), hallucinogens, and cannabis. For each class, it lists examples, describes typical physiological responses, and outlines the adverse effects associated with overuse, such as irritability, hallucinations, respiratory depression, and psychosis. The material also introduces the distinction between physical and psychological dependence and the management of withdrawal symptoms.