Trabajos

A drug, broadly speaking, is any substance that, when absorbed into the body of a living organism, alters normal bodily function.[3] There is no single, precise definition, asthere are different meanings in drug control law, government regulations, medicine, and colloquial usage.[4]
In pharmacology, a drug is "a chemical substance used in the treatment,cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being."[4] Drugs may be prescribed for a limited duration, or on a regular basis forchronic disorders.[5]
The molecules of drugs are complex, and most of them consist of many hydrogen and carbon atoms, a few oxygen atoms, and one or a few nitrogen atoms. Drugs mayalso have no nitrogen atoms in it and many may have chlorine atoms in it, such as chloral hydrate.
Recreational drugs are chemical substances that affect the central nervoussystem, such as opioids or hallucinogens.[5] They may be used for perceived beneficial effects on perception, consciousness, personality, and behavior.[5][6] Some drugs can causeaddiction and/or habituation.[6]
Drugs are usually distinguished from endogenous biochemicals by being introduced from outside the organism.[citation needed] For example, insulin is ahormone that is synthesized in the body; it is called a hormone when it is synthesized by the pancreas inside the body, but if it is introduced into the body from outside, it iscalled a drug.[citation needed] Many natural substances, such as beers, wines, and psychoactive mushrooms, blur the line between food and recreational drugs, as when ingested theyaffect the functioning of both mind and body and some substances normally considered drugs such as DMT (Dimethyltryptamine) are actually produced by the human body in trace amounts.