Definition: Drug addiction, also known as substance use disorder (SUD), is a chronic, relapsing brain disease characterized by compulsive drug seeking, continued use despite harmful consequences, and long-lasting changes in the brain. It is both a complex brain disorder and a mental illness. Â Types of Addictive Substances 1. Opioids: Heroin, …
DeepakRajput 
Hallucinogens: Definition, Classification, Mechanism and Side effects
Definition: Hallucinogens, also known as psychedelics, are a class of drugs that alter perception, mood, and cognitive processes, often leading to profound changes in consciousness and sensory experiences. These substances can induce hallucinations, distortions of time and space, and altered states of consciousness. Hallucinogens are typically divided into two categories: …
