Metamizole sodium is a non-steroidal anti-inflammatory drug (NSAID Nonsteroidal anti-inflammatory drugs, usually abbreviated to NSAIDs or NAIDs, are drugs with analgesic and antipyretic effects and which have, in higher doses, anti-inflammatory effects (reducing inflammation). The term "nonsteroidal" is used to distinguish these drugs from steroids, which (among a broad range of other effects) have a), commonly used in many countries as a powerful analgesic An analgesic is any member of the group of drugs used to relieve pain (achieve analgesia). The word analgesic derives from Greek an- ("without") and algos ("pain"). Analgesic drugs act in various ways on the peripheral and central nervous systems; they include paracetamol (para-acetylaminophenol, also known in the US as and antipyretic Antipyretics are drugs that reduce fever. They will not normally lower body temperature if one does not have a fever. Antipyretics cause the hypothalamus to override an interleukin-induced increase in temperature. The body will then work to lower the temperature and the result is a reduction in fever. It is better known under the names Dipyrone, Analgin, Novalgin, Algocalmin, and Melubrin.

Metamizole was first synthesized by the German A region named Germania, inhabited by several Germanic peoples, has been known and documented before AD 100. Beginning in the 10th century, German territories formed a central part of the Holy Roman Empire, which lasted until 1806. During the 16th century, northern Germany became the centre of the Protestant Reformation. As a modern nation-state, company Hoechst AG Hoechst AG was a German chemicals then life-sciences company that became Aventis after its merger with Rhône-Poulenc S.A. in 1999, and now Sanofi-Aventis after 2004. It has been called "The pharmacy of the world" for its important role in the world's drug market (now part of Sanofi-Aventis Sanofi-Aventis , headquartered in Paris, France, is a multinational pharmaceutical company, the world's fourth-largest by prescription sales. Sanofi-Aventis engages in the research and development, manufacturing and marketing of pharmaceutical products for sale principally in the prescription market, but the firm also develops over-the-counter) in 1920, and its mass production started in 1922. It remained freely available worldwide until the 1970s, when it was discovered that the drug carries a small risk of causing agranulocytosis Agranulocytosis, also known as agranulosis, is an acute condition involving a severe and dangerous leukopenia , most commonly of neutrophils, causing a neutropenia in the circulating blood. It represents a severe lack of one major class of infection-fighting white blood cells. People with this condition are at very high risk of serious infections - a potentially fatal condition. Controversy remains regarding the level of risk. Several national medical authorities have banned metamizole either totally or have restricted it to be available only on prescription, while others have maintained its availability over the counter Over-the-counter drugs are medicines that may be sold directly to a consumer without a prescription from a health care professional, as compared to prescription drugs, which may only be sold to consumers possessing a valid prescription. In many countries, OTC drugs are selected by a regulatory agency to ensure that they are ingredients that are.

Contents

Risk of agranulocytosis

According to comments by Dr. Anthony Wong of the University of São Paulo The University of São Paulo is one of the three public universities funded by the State of São Paulo, Brazil Brazil (pronounced /brəˈzɪl/ ; Portuguese: Brasil, IPA: [bɾaˈziw]), officially the Federative Republic of Brazil (Portuguese: República Federativa do Brasil, listen (help·info)), is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population. It is the only Portuguese-speaking in a WHO The World Health Organization is a specialized agency of the United Nations (UN) that acts as a coordinating authority on international public health. Established on April 7, 1948, with headquarters in Geneva, Switzerland, the agency inherited the mandate and resources of its predecessor, the Health Organization, which had been an agency of the newsletter,[1] recent studies estimate that the incidence rate of metamizole-induced agranulocytosis Agranulocytosis, also known as agranulosis, is an acute condition involving a severe and dangerous leukopenia , most commonly of neutrophils, causing a neutropenia in the circulating blood. It represents a severe lack of one major class of infection-fighting white blood cells. People with this condition are at very high risk of serious infections is between 0.2 and 2 cases per million person days of use, with approximately 7% of all cases fatal (provided that all patients have access to urgent medical care). In other words, one should expect 60 to 600 deaths annually due to metamizole in a country of 300 million, assuming that every citizen takes the drug once a month. This is not a very high rate compared to other drugs - for example, the prescription drug clozapine Clozapine is an antipsychotic medication used in the treatment of schizophrenia. The first of the atypical antipsychotics to be developed, it was first introduced in Europe in 1971, but was voluntarily withdrawn by the manufacturer in 1975 after it was shown to cause agranulocytosis, a condition involving a dangerous decrease in the number of is known to be at least 50 times more likely to trigger agranulocytosis. However, at the time the risk was assumed to be much greater and, as such, excessive for an over-the-counter analgesic An analgesic is any member of the group of drugs used to relieve pain (achieve analgesia). The word analgesic derives from Greek an- ("without") and algos ("pain"). Analgesic drugs act in various ways on the peripheral and central nervous systems; they include paracetamol (para-acetylaminophenol, also known in the US as, especially considering the existence of safer alternatives (e.g., aspirin Aspirin , also known as acetylsalicylic acid (pronounced /əˌsɛtəlˌsælɨˈsɪlɨk/ ə-SET-əl-sal-i-SIL-ik, abbreviated ASA), is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication (ASA) and ibuprofen US FDA:link).

In 1998, Andrade et al. conducted a meta-analysis In statistics, a meta-analysis combines the results of several studies that address a set of related research hypotheses. In its simplest form, this is normally by identification of a common measure of "effect size", for which a weighted average might be the output of a meta-analyses. Here the weighting might be related to sample sizes to compare epidemiologic Epidemiology is the study of factors affecting the health and illness of populations, and serves as the foundation and logic of interventions made in the interest of public health and preventive medicine. It is considered a cornerstone methodology of public health research, and is highly regarded in evidence-based medicine for identifying risk studies from 1975 to 1995 and estimated that the excess mortality per million from community acquired cases of agranulocytosis, aplastic anaemia, anaphylaxis Anaphylaxis is an acute multi-system severe type I hypersensitivity reaction. The term comes from the Greek words ἀνά ana and φύλαξις phylaxis (protection) and serious upper gastrointestinal The Human gastrointestinal tract refers to the stomach and intestine, and sometimes to all the structures from the mouth to the anus. complications was 592 for diclofenac Diclofenac is a non-steroidal anti-inflammatory drug (NSAID) taken to reduce inflammation and as an analgesic reducing pain in conditions such as arthritis or acute injury. It can also be used to reduce menstrual pain, dysmenorrhea. The name is derived from its chemical name: 2-(2,6-dichloranilino) phenylacetic acid, 185 for ASA Aspirin , also known as acetylsalicylic acid (pronounced /əˌsɛtəlˌsælɨˈsɪlɨk/ ə-SET-əl-sal-i-SIL-ik, abbreviated ASA), is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication, 25 for metamizole, and 20 for paracetamol US FDA:link.[2] CIOMS IV in the same year reported the excess mortality risk for the same conditions to be: diclofenac = 5.92; ASA = 2.03; metamizole = 0.20; and paracetamol=0.25. These studies certainly suggest that the risks from adverse reactions to metamizole are similar to those posed by paracetamol, a drug widely reputed to be safe. According to the CIOMS IV conclusion “Newer methods of epidemiological studies have shown that the risk of agranulocytosis (1.7 per million) due to metamizole was exaggerated in the 70’s”.[3]

A study in Northern Sweden Sweden (pronounced /ˈswiːdən/ SWEE-dən, Swedish: Sverige pronounced [ˈsveːrijə] ( listen)), officially the Kingdom of Sweden (Swedish: Konungariket Sverige (help·info)), is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden has land borders with Norway to the west and Finland to the northeast, and water borders with published in 2002 estimated the total risk during metamizole therapy for patients in hospitals (inpatients) and outside of hospital (outpatients) about 3 to 100 times greater than that estimated by Dr. Wong: "Given certain assumptions including the actual amounts prescribed the calculated risks of agranulocytosis would be approximately one out of every 31,000 metamizole-treated inpatients and one of every 1400 metamizole-treated outpatients."[4]

Availability around the world

Metamizole was banned in Sweden in 1974, and in the United States ^ b. English is the de facto language of American government and the sole language spoken at home by 80% of Americans age five and older. Spanish is the second most commonly spoken language in 1977. Since then, more than 30 countries (including Japan Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south. The characters that make up Japan's name mean "sun-origin", which is why Japan is, Australia For at least 40,000 years before European settlement in the late 18th century, Australia was inhabited by indigenous Australians, who belonged to one or more of the roughly 250 language groups. After sporadic visits by fishermen from the immediate north and discovery by Dutch explorers in 1606, Australia's eastern half was claimed by Britain in 177, Iran Iran (Persian: ایران [ʔiˈɾɒn] ), officially the Islamic Republic of Iran is a country in Central Eurasia and Western Asia. The name Iran has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was also known to the western world as Persia. Both Persia and Iran are used, and several of the European Union The European Union is an economic and political union of 27 member states which are located primarily in Europe. Committed to regional integration, the EU was established by the Treaty of Maastricht in 1993 upon the foundations of the European Communities. With over 500 million citizens, the EU combined generated an estimated 28% share (US$ 16.5 member nations) have followed suit. In these countries, metamizole is still occasionally used as a veterinary Veterinary medicine is the branch of science that deals with the application of medical, surgical, public health, dental, diagnostic, and therapeutic principles to non-human animals, including wildlife and domesticated animals, including livestock, working animals, and companion animals. Practitioners of veterinary medicine are known as drug. In Germany, Hungary, Italy, Portugal and Spain it is a prescription drug. Some European pharmaceutical companies, notably Hoechst and Merck, continue to develop metamizole-containing drugs and market them in some countries. In Sweden, the ban was lifted in 1995 only to be re-introduced in 1999.

In other parts of the world (including Bulgaria Bulgaria (pronounced /bʌlˈɡɛəriə/ Bulgarian: България, Balgariya, pronounced [bɤ̞lˈɡarijɐ]), officially the Republic of Bulgaria (Република България, Republika Balgariya, [rɛˈpublikɐ bɤ̞lˈɡarijɐ]), is a country in south-eastern Europe. Bulgaria borders five other countries: Romania to the north (mostly, Mexico In Pre-Columbian Mesoamerica many cultures matured into advanced civilizations such as the Olmec, the Toltec, the Teotihuacan, the Zapotec, the Maya and the Aztec before the first contact with Europeans. In 1521, Spain conquered and colonized the territory, which was administered as the viceroyalty of New Spain which would eventually become Mexico, India Home to the ancient Indus Valley Civilisation and a region of historic trade routes and vast empires, the Indian subcontinent was identified with its commercial and cultural wealth for much of its long history. Four major religions, Hinduism, Buddhism, Jainism and Sikhism originated here, while Zoroastrianism, Judaism, Christianity and Islam, Egypt Egypt (pronounced /ˈiːdʒɪpt/ ; Arabic: مصر‎ Miṣr, pronounced [misˤɾ] ( listen); Arabic: مِصْر Miṣr [ˈmisˤɾ]; Egyptian Arabic: مَصْر Maṣr [ˈmɑsˤɾ]; Coptic: Ⲭⲏⲙⲓ, kīmi; Egyptian: 𓆎𓅓𓏏𓊖 Kemet), officially the Arab Republic of Egypt, is a country mainly in North Africa, with the Sinai Peninsula, Brazil Brazil (pronounced /brəˈzɪl/ ; Portuguese: Brasil, IPA: [bɾaˈziw]), officially the Federative Republic of Brazil (Portuguese: República Federativa do Brasil, listen (help·info)), is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population. It is the only Portuguese-speaking, Poland Poland /ˈpəʊlənd/ (Polish: Polska), officially the Republic of Poland (Rzeczpospolita Polska), is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north. The total area of, Russia Russia (pronounced /ˈrʌʃə/ ; Russian: Россия, tr. Rossiya, pronounced [rɐˈsʲijə] ( listen)), also officially known as the Russian Federation (Russian: Российская Федерация, pronounced [rɐˈsʲijskəjə fʲɪdʲɪˈraʦəjə] ( listen)), is a state in northern Eurasia. It is a federal semi-presidential republic,, Turkey Turkey , known officially as the Republic of Turkey ( Türkiye Cumhuriyeti (help·info)), is a Eurasian country that stretches across the Anatolian peninsula in western Asia and Thrace (Rumelia) in the Balkan region of southeastern Europe. Turkey is one of the six independent Turkic states. Turkey is bordered by eight countries: Bulgaria to the, the Republic of Macedonia Coordinates: 41°36′11″N 21°42′54″E / 41.603°N 21.715°E Macedonia (Macedonian: Македонија; English: /ˌmæsɨˈdoʊniə/ mas-i-DOH-nee-ə), officially the Republic of Macedonia (Република Македонија, transliterated: Republika Makedonija [rɛˈpublika makɛˈdɔnija] ( listen)), is a landlocked country, Romania Romania (pronounced /roʊˈmeɪniə/ roe-MAY-nee-ə; dated: Rumania; Romanian: România [romɨˈni.a] ( listen)) is a country located at the crossroads of Central and Southeastern Europe, north of the Balkan Peninsula, on the Lower Danube, within and outside the Carpathian arch, bordering on the Black Sea. Almost all of the Danube Delta is located, Israel Israel , officially the State of Israel (Hebrew: מְדִינַת יִשְׂרָאֵל (help·info), Medīnat Yisrā'el; Arabic: دَوْلَةُ إِسْرَائِيلَ‎, Dawlat Isrā'īl), is a parliamentary republic in the Middle East located on the eastern shore of the Mediterranean Sea. It borders Lebanon in the north, Syria in the, Kosovo Kosovo is a disputed territory in the Balkans. The partially-recognised Republic of Kosovo (Albanian: Republika e Kosovës; Serbian: Република Косово, Republika Kosovo), a self-declared independent state, has de facto control over most of the territory, with limited control in North Kosovo. Serbia does not recognise the unilateral and some developing countries) metamizole is still freely available over-the-counter, remains one of the most popular analgesics, and plays an important role in self-medication. For example, metamizole and metamizole-containing drugs account for 80% of OTC analgesic market in Russia, whereas ibuprofen US FDA:link accounts for 2.5%. In Brazil, metamizole (Novalgina) products, although over-the-counter, carry warnings to avoid usage by those under 19 years old, and include some information about early detection and treatment of agranulocytosis Agranulocytosis, also known as agranulosis, is an acute condition involving a severe and dangerous leukopenia , most commonly of neutrophils, causing a neutropenia in the circulating blood. It represents a severe lack of one major class of infection-fighting white blood cells. People with this condition are at very high risk of serious infections. Although the Brazilian government did not push for a ban on the drug, its use has seen a decline in the past years as pharmaceutical companies and doctors pushed aspirin Aspirin , also known as acetylsalicylic acid (pronounced /əˌsɛtəlˌsælɨˈsɪlɨk/ ə-SET-əl-sal-i-SIL-ik, abbreviated ASA), is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication, paracetamol US FDA:link and ibuprofen-based products as replacement, especially regarding child care. Amongst adults it is still widely used. Some of the most widely available metamizole-containing products still in use in Brazil are: Buscopan Plus (under the name of Buscopan Composto), Novalgina and Neosaldina. Generic Dipyrone is also available.

Metamizole has such high usage in Brazil, that in late 2008 Sanofi-aventis Sanofi-Aventis , headquartered in Paris, France, is a multinational pharmaceutical company, the world's fourth-largest by prescription sales. Sanofi-Aventis engages in the research and development, manufacturing and marketing of pharmaceutical products for sale principally in the prescription market, but the firm also develops over-the-counter released a new version of the product with 1 g of metamizole per tablet (twice the normal 500 mg dosage available before), still under the Novalgina name.

In Israel, Metamizole is used as the first level of pain treatment in hospitals, and is given in standard, over-the-counter doses. (In the US, the first-level painkiller is usually ibuprofen, given in doses that are 120–200% of the over-the-counter dose.)

Antipyretic effect

A randomized, double blind, multinational study involving 555 children showed that metamizole and ibuprofen were significantly more effective than paracetamol in achieving normal body temperatures; metamizole produced a significantly greater temperature reduction than ibuprofen and paracetamol, and helped maintain low temperatures for a longer duration.[5]

Media attention

Metamizole received a brief period of attention by American media in 2001,[6] when a Latino Hispanic and Latino Americans are Americans with origins in the Hispanic countries of Latin America or in Spain. The group encompasses distinct sub-groups by national origin and race, with ancestries from all continents represented. Some members of the community prefer Hispanic and others Latino, the latter being more common in the western United immigrant Immigration is the introduction of new people into a habitat or population. It is a biological concept and is important in population ecology, differentiated from emigration and migration boy was admitted into a Salt Lake City Salt Lake City is the capital and the most populous city of the U.S. state of Utah. The name of the city is often shortened to Salt Lake or SLC. With an estimated population of 183,171, the city lies in the Salt Lake City metropolitan area, which has a total estimated population of 1,130,293. Salt Lake City is further situated in a larger urban clinic with symptoms of agranulocytosis. It was discovered that the drug remained freely available in Latino shops and highly popular among Mexican immigrants, despite the ban. The ongoing "LATIN" Study, a multicenter international case-control study, is examining the incidence of agranulocytosis in Latin America and the role of metamizole.

Brand names

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What to feed a cat that's losing weight?
Q. My 12-year-old female Siamese has hyperthyroidism. She's now on medication (Metamizole) which has stopped her vomitting and loose stool, but now she's losing weight and her breath smells bad. She's otherwise in good spirits although lately she's been sleeping more, so I'm not sure what to do about her diet.
Asked by Garden Hoe - Sun Nov 1 21:12:19 2009 - - 6 Answers - 0 Comments

A. Have you considered asking your vet ??? This would be the best person to consult on this issue, since he knows your cat and what medicines she's taking. Call and talk it over with him...Hope your girl feels better soon... Good luck.
Answered by brutusmom - Sun Nov 1 21:17:46 2009

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