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Drug
hideA 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.
For more information about Drug, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with drug
Brain Scan Study Shows Cocaine Abusers Can Control Cravings
9 hours ago |
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(PhysOrg.com) -- When asked to inhibit their response to a "cocaine-cues" video, active cocaine abusers were, on average, able to suppress activity in brain regions linked to drug craving, according to a new ...
Is it right for drug companies to carry out their own clinical trials?
7 hours ago |
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In BMJ today two experts debate whether the conflict of interest is unacceptable when drug companies carry out clinical trials on their own medicines.
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Does a placebo gene exist?
11 hours ago |
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A short time ago, Swedish scientists published a paper suggesting the existence of a genetic disposition to respond to placebo, thus giving rise to debate in the media about a possible "placebo gene." In the current issue ...
Researchers identify new mechanism of blocking HIV-1 from entering cells
Medicine & Health / HIV & AIDS
9 hours ago |
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Publishing in PLoS Pathogens, researchers at from the Kimmel Cancer Center at Jefferson have found a novel mechanism by which drugs block HIV-1 from entering host cells.
Coverage of inexpensive drugs may increase length and quality of life after heart attack
8 hours ago |
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Providing free medications to people after heart attack could add years to patients' lives at a relatively low cost for provincial governments, according to a new study by researchers at St. Michael's Hospital in Toronto.
WHO: Treat HIV patients sooner
Medicine & Health / HIV & AIDS
16 hours ago |
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(AP) -- People infected with the virus that causes AIDS should start treatment earlier than currently recommended, the World Health Organization said Monday.
Biology of emergent Salmonella exposed
4 hours ago |
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Researchers have characterised a new multi drug resistant strain of Salmonella Typhimurium that is causing life-threatening disease in Africa.
Scientists reveal malaria parasites' tactics for outwitting our immune systems
5 hours ago |
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Malaria parasites are able to disguise themselves to avoid the host's immune system, according to research funded by the Wellcome Trust and published today in the journal Proceedings of the National Academy of ...
Europe's device therapy use for heart failure doubles 2004-2008, some countries have low uptake
7 hours ago |
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The use of implantable devices for the treatment of heart failure increased "enormously" in Europe between the years 2004 and 2008, but there still remain large differences between countries, according to a study reported ...
'The pill' for him: Scientists find a hormonal on-and-off switch for male fertility
8 hours ago |
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A new research report published in the December 2009 print issue of The FASEB Journal could one day give men similar type of control over their fertility that women have had since the 1960s. That's because scientists have f ...
Western diets turn on fat genes
9 hours ago |
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Those extra helpings of gravy and dessert at the holiday table are even less of a help to your waistline than previously thought. According to a new research report recently appearing online in The FASEB Journal, a diet t ...
Montreal Heart Institute performs its first implant of new prosthesis for cardiac arrhythmia
7 hours ago |
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A multidisciplinary team from the Montreal Heart Institute (MHI), which is affiliated to the Université de Montréal, performed its first catheter implantation of a new prosthesis (Amptlazer Cardiac Plug) closing ...
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