Cancer

Tecentriq approved for small cell lung cancer

(HealthDay)—Tecentriq (atezolizumab) has been approved by the U.S. Food and Drug Administration to treat adults with extensive-stage small cell lung cancer (ES-SCLC).

Diseases, Conditions, Syndromes

Imaging data reveals nanomedicines in lungs

The PneumoNP project aims at developing new inhaled nanotherapeutic formulations to combat lung infection. The novel drug is comprised of an antibiotic carried by a nanoparticle. For this project, Spanish researchers from ...

Neuroscience

Breaking the stress and drug abuse connection

When people undergo stress, some turn to alcohol or other drugs to help them cope. Most of us, certainly, have had the experience of cracking open a beer to relax at the end of a tough day. But in cases of extreme or long-term ...

Psychology & Psychiatry

Inflammation links heart disease and depression, study finds

People with heart disease are more likely to suffer from depression, and the opposite is also true. Now, scientists at the University of Cambridge believe they have identified a link between these two conditions: inflammation—the ...

Neuroscience

Brain research reveals a circuit for cocaine relapse

Approximately 1.5 million Americans use cocaine in a given year, according to the National Institute on Drug Abuse. Many are repeat users. Unfortunately, there are currently no FDA-approved medicinal treatments for cocaine ...

Diseases, Conditions, Syndromes

TGen and ABL pursue global rollout of advanced TB test

In an important step toward eradicating tuberculosis (TB), the Translational Genomics Research Institute (TGen), an affiliate of City of Hope, has signed a licensing agreement with an international biomedical firm, Advanced ...

Inflammatory disorders

'Inflamm-aging' causes loss of bone healing ability in the elderly

Increases in chronic inflammation—not the passage of time—is the main reason why injured bones do not heal as well with age. This is the finding of a study in mice and humans published March 18 in the Proceedings of the ...

page 1 from 23

Drug

A drug, broadly speaking, is any substance that, when absorbed into the body of a living organism, alters normal bodily function. There is no single, precise definition, as there are different meanings in drug control law, government regulations, medicine, and colloquial usage.

In pharmacology, Dictionary.com defines a drug as "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being." Drugs may be prescribed for a limited duration, or on a regular basis for chronic disorders.

Recreational drugs are chemical substances that affect the central nervous system, such as opioids or hallucinogens. They may be used for perceived beneficial effects on perception, consciousness, personality, and behavior. Some drugs can cause addiction and habituation.

Drugs are usually distinguished from endogenous biochemicals by being introduced from outside the organism.[citation needed] For example, insulin is a hormone 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 is called a drug.[citation needed]

Many natural substances such as beers, wines, and some mushrooms, blur the line between food and drugs, as when ingested they affect the functioning of both mind and body.

This text uses material from Wikipedia, licensed under CC BY-SA