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Anorexia (deriving from the Greek "α(ν)-" (a(n)-, a prefix that denotes absence) + "όρεξη (orexe) = appetite) is the decreased sensation of appetite. While the term in non-scientific publications is often used interchangeably with one of its causes, anorexia nervosa, there are many possible causes for a decreased appetite, some of which may be harmless while others pose significant risk for the person. For other uses, see Anorexia. ... Image File history File links This is a lossless scalable vector image. ... The term symptom (from the Greek meaning chance, mishap or casualty, itself derived from συμπιπτω meaning to fall upon or to happen to) has two similar meanings in the context of physical and mental health: Strictly, a symptom is a sensation or change in health function experienced by a patient. ... In medicine, a sign is a feature of disease as detected by the doctor during physical examination of a patient. ... The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10) is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization (WHO). ... The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ... The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ... The appetite is the desire to eat food, felt as hunger. ... For other uses, see Anorexia. ...

Causes

The most common form of anorexia is simply satiation following the consumption of food. This happens in all normal humans and is called postprandial anorexia. Disorders that cause (harmful) anorexia include anorexia nervosa, severe depression, cancer, Crohn's Disease, Ulcerative Colitis, dementia, AIDS, Acute Radiation Syndrome, and chronic renal failure and the use of certain drugs, particularly stimulants and narcotics such as cocaine and heroin. Environmentally induced disorders such as altitude sickness can also trigger an acute form of anorexia. Anorexia may also be seen in congestive heart failure, perhaps due to congestion of the liver with venous blood. Satiety, or the feeling of fullness and disappearance of appetite after a meal, is a process mediated by the ventromedial nucleus in the hypothalamus. ... For other uses, see Anorexia. ... On the Threshold of Eternity. ... Cancer is a class of diseases or disorders characterized by uncontrolled division of cells and the ability of these to spread, either by direct growth into adjacent tissue through invasion, or by implantation into distant sites by metastasis (where cancer cells are transported through the bloodstream or lymphatic system). ... Crohns disease (also known as regional enteritis) is a chronic, episodic, inflammatory condition of the gastrointestinal tract characterized by transmural inflammation (affecting the entire wall of the involved bowel) and skip lesions (areas of inflammation with areas of normal lining between). ... Ulcerative colitis (Colitis ulcerosa, UC) is a form of inflammatory bowel disease (IBD). ... For other uses, see Dementia (disambiguation). ... For other uses, see AIDS (disambiguation). ... Radiation poisoning, also called radiation sickness, is a form of damage to organic tissue due to excessive exposure to ionizing radiation. ... Chronic renal failure (CRF, or chronic kidney failure, CKF, or chronic kidney disease, CKD) is a slowly progressive loss of renal function over a period of months or years and defined as an abnormally low glomerular filtration rate, which is usually determined indirectly by the creatinine level in blood serum. ... A stimulant is a drug which increases the activity of the sympathetic nervous system and produces a sense of euphoria or awakeness. ... The term narcotic, derived from the Greek word for stupor, originally referred to a variety of substances that induced sleep (such state is narcosis). ... Altitude sickness, also known as acute mountain sickness (AMS), altitude illness, or soroche, is a pathological condition that is caused by acute exposure to low air pressure (usually outdoors at high altitudes). ... Congestive heart failure (CHF), also called congestive cardiac failure (CCF) or just heart failure, is a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood throughout the body. ... For the bird, see Liver bird. ... In the circulatory system, venous blood is blood returning to the heart. ...

Although the presenting symptom (the one which prompts a patient to seek medical attention) in acute appendicitis is abdominal pain, patients virtually always experience anorexia as well, possibly accompanied by an early episode of vomiting. The term symptom (from the Greek syn = con/plus and pipto = fall, together meaning co-exist) has two similar meanings in the context of physical and mental health: A symptom may loosely be said to be a physical condition which shows that one has a particular illness or disorder (see... Abdominal pain can be one of the symptoms associated with transient disorders or serious disease. ... Emesis redirects here. ...

Some medications, antidepressants for example, can have anorexia as a side effect. Most notoriously, however, chemicals that are a member of the phenethylamine family are known to have more intense anorectic properties. For this reason, many individuals suffering from anorexia nervosa may seek to use these medications to suppress appetite. Such prescription medications include Ritalin, Adderall, Dexedrine, and Desoxyn. In some cases, these medications are prescribed to patients prior to undergoing an operation requiring general anesthesia. This is a prophylactic measure taken to ensure no food will back up into the esophagus and cause the patient to stop breathing during the procedure. An antidepressant is a medication used primarily in the treatment of clinical depression. ... Phenethylamine, or β-Phenylethylamine, is an alkaloid and monoamine. ... Methylphenidate (C14H19NO2), or MPH, is an amphetamine-like prescription stimulant commonly used to treat Attention Deficit Hyperactivity Disorder (ADHD) in children and adults. ... Adderall XR 15 mg capsule Adderall is a pharmaceutical psychostimulant comprised of mixed amphetamine salts. ... Dextroamphetamine (also known as dextroamphetamine sulfate, dexamphetamine, dexedrine, Dexampex, Ferndex, Oxydess II, Robese, Spancap #1, and, informally, Dex), a stereoisomer of amphetamine, is an indirect-acting stimulant that releases norepinephrine from nerve terminals, thus promoting nerve impulse transmission. ... Bulk pharmaceutical bottle of Desoxyn Desoxyn® CII is a brand pharmaceutical form of dextromethamphetamine hydrochloride (also known as desoxyephedrine, hence the name Desoxyn), indicated for treatment of Attention Deficit Disorder/Attention Deficit/Hyperactivity Disorder (ADD/ADHD), narcolepsy, and exogenous obesity. ...