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Artemisinin Derivatives
Artemisinin () and its semisynthetic derivatives are a group of drugs used in the treatment of malaria due to ''Plasmodium falciparum''. It was discovered in 1972 by Tu Youyou, who shared the 2015 Nobel Prize in Physiology or Medicine for her discovery. Artemisinin-based combination therapies (ACTs) are now standard treatment worldwide for ''P. falciparum'' malaria as well as malaria due to other species of ''Plasmodium''. Artemisinin is extracted from the plant ''Artemisia annua'', sweet wormwood, a herb employed in Chinese traditional medicine. A precursor compound can be produced using a genetically engineered yeast, which is much more efficient than using the plant. Artemisinin and its derivatives are all sesquiterpene lactones containing an unusual peroxide bridge. This endoperoxide 1,2,4-trioxane ring is responsible for their antimalarial properties. Few other natural compounds with such a peroxide bridge are known. Artemisinin and its derivatives have been used for the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semisynthesis
Semisynthesis, or partial chemical synthesis, is a type of chemical synthesis that uses chemical compounds isolated from natural sources (such as microbial cell cultures or plant material) as the starting materials to produce novel compounds with distinct chemical and medicinal properties. The novel compounds generally have a high molecular weight or a complex molecular structure, more so than those produced by total synthesis from simple starting materials. Semisynthesis is a means of preparing many medicines more cheaply than by total synthesis since fewer chemical steps are necessary. Overview Drugs derived from natural sources are usually produced by isolation from the natural source or, as described here, by semisynthesis from such an isolated agent. From the viewpoint of chemical synthesis, living organisms are remarkable chemical factories that can easily produce structurally-complex chemical compounds by biosynthesis. In contrast, engineered chemical synthesis is nece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Education In Chemistry
''Education in Chemistry'' (often referred to by its brand 'EiC') is a print and online magazine covering all areas of chemistry education, mainly concentrating on the teaching of chemistry in secondary schools and universities. It is published by the Royal Society of Chemistry, which also publishes ''Chemistry Education Research and Practice'', a peer-reviewed academic journal on the same topic. History The feasibility of a "British Journal of Chemistry Education" was first discussed by the Royal Society of Chemistry in late 1962 (a similar journal, the ''Journal of Chemical Education'' had been in existence in the USA since 1924). Its launch was secured by the lobbying of Professor Ronald S. Nyholm who became the first Chair of the editorial board. The magazine was launched in 1963 under the editor Dr F. W. Gibbs with the first issue published in January 1964. Gibbs' first editorial, "Scientists and Teachers", set out the aims of the publication, "This journal has been launche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artesunate/sulfadoxine/pyrimethamine
Artesunate/sulfadoxine/pyrimethamine is an artesunate-based oral medication used to treat malaria. It consists of artesunate and sulfadoxine/pyrimethamine Sulfadoxine/pyrimethamine, sold under the brand name Fansidar, is a combination medication used to treat malaria. It contains sulfadoxine (a sulfonamide) and pyrimethamine (an antiprotozoal). For the treatment of malaria it is typically used alon .... References Antimalarial agents {{antiinfective-drug-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dihydroartemisinin/piperaquine
Piperaquine/dihydroartemisinin (DHA/PPQ), sold under the brand name Eurartesim among others, is a fixed dose combination medication used in the treatment of malaria. It is a combination of piperaquine and dihydroartemisinin. Specifically it is used for malaria of the ''P. falciparum'' and ''P. vivax'' types. It is taken by mouth. Side effects are uncommon. Concerns include the possibility of QT prolongation. Versions are available for use in children. Use in early pregnancy is not recommended. The two medications work by different mechanisms. Piperaquine/dihydroartemisinin was approved for medical use in Europe in 2011. The combination is on the World Health Organization's List of Essential Medicines. It is commercially available in Africa and Asia. It has been used to treat more than 4.5million people as of 2017. Pharmacology Dihydroartemisinin (also known as dihydroqinghaosu, artenimol or DHA) is a drug used to treat malaria. Dihydroartemisinin is the active metabolite of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artesunate/mefloquine
Artesunate/mefloquine is a medication used to treat malaria. It is a fixed dose combination of artesunate and mefloquine. Specifically it is recommended to treat uncomplicated falciparum malaria. It is taken by mouth. Side effects are similar to the medications being used separately. Use is recommended as it decreases the possibility of either medications being used alone. Dose forms appropriate for children are also available. Artesunate/mefloquine came into commercial use in 2008. It is on the World Health Organization's List of Essential Medicines. It is approved for medical use in Brazil, India, and Malaysia. It is not commercially available in the United States. Medical uses Artesunate/mefloquine is a recommended treatment in Southeast Asia while in Africa artesunate/amodiaquine, artemether/lumefantrine, artesunate/sulfadoxine/pyrimethamine are often preferred. See also * Dihydroartemisinin/piperaquine Piperaquine/dihydroartemisinin (DHA/PPQ), sold under the brand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artesunate/amodiaquine
Artesunate/amodiaquine, sold under the trade name Camoquin among others, is a medication used for the treatment of malaria. It is a fixed-dose combination of artesunate and amodiaquine. Specifically it recommended for acute uncomplicated ''Plasmodium falciparum'' malaria. It is taken by mouth. Common side effects include loss of appetite, nausea, abdominal pain, sleepiness, trouble sleeping, and cough. Safety in pregnancy is not clear; however, the medication may be used if others are not possible. It is believed to be safe for use during breastfeeding. Artesunate and amodiaquine are both antimalarial medication; however, work by different mechanisms. Artesunate/amodiaquine was commercially launched in 2007. It is on the World Health Organization's List of Essential Medicines. Artesunate/amodiaquine is available as a generic medication A generic drug is a pharmaceutical drug that contains the same chemical substance as a drug that was originally protected by chemical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artemether/lumefantrine
Artemether/lumefantrine, sold under the trade name Coartem among others, is a combination of the two medications artemether and lumefantrine. It is used to treat malaria caused by ''Plasmodium falciparum ''Plasmodium falciparum'' is a unicellular protozoan parasite of humans, and the deadliest species of ''Plasmodium'' that causes malaria in humans. The parasite is transmitted through the bite of a female '' Anopheles'' mosquito and causes the d ...'' that is not treatable with chloroquine. It is not typically used to prevent malaria. It is taken by mouth. Common side effects include muscle and joint pains, fever, loss of appetite, and headache. Serious side effects include Long QT syndrome, prolongation of the QT interval. While not well studied, it appears to be safe for use in pregnancy. The dose does not need changing in those with mild or moderate kidney or liver problems. The combination came into medical use in 1992. They were both developed in China. It is on the WH ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncomplicated Malaria
Malaria is a Mosquito-borne disease, mosquito-borne infectious disease that affects humans and other animals. Malaria causes Signs and symptoms, symptoms that typically include fever, fatigue (medical), tiredness, vomiting, and headaches. In severe cases, it can cause jaundice, Epileptic seizure, seizures, coma, or death. Symptoms usually begin ten to fifteen days after being bitten by an infected mosquito. If not properly treated, people may have recurrences of the disease months later. In those who have recently survived an infection, reinfection usually causes milder symptoms. This partial Immunity (medical), resistance disappears over months to years if the person has no continuing exposure to malaria. Malaria is caused by protozoa, single-celled microorganisms of the ''Plasmodium'' group. It is spread exclusively through bites of infected ''Anopheles'' mosquitoes. The mosquito bite introduces the parasites from the mosquito's saliva into a person's blood. The parasites trav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drug Resistance
Drug resistance is the reduction in effectiveness of a medication such as an antimicrobial or an antineoplastic in treating a disease or condition. The term is used in the context of resistance that pathogens or cancers have "acquired", that is, resistance has evolved. Antimicrobial resistance and antineoplastic resistance challenge clinical care and drive research. When an organism is resistant to more than one drug, it is said to be multidrug-resistant. The development of antibiotic resistance in particular stems from the drugs targeting only specific bacterial molecules (almost always proteins). Because the drug is ''so'' specific, any mutation in these molecules will interfere with or negate its destructive effect, resulting in antibiotic resistance. Furthermore, there is mounting concern over the abuse of antibiotics in the farming of livestock, which in the European Union alone accounts for three times the volume dispensed to humans – leading to development of super-resi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Health Organization
The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. The WHO Constitution states its main objective as "the attainment by all peoples of the highest possible level of health". Headquartered in Geneva, Switzerland, it has six regional offices and 150 field offices worldwide. The WHO was established on 7 April 1948. The first meeting of the World Health Assembly (WHA), the agency's governing body, took place on 24 July of that year. The WHO incorporated the assets, personnel, and duties of the League of Nations' Health Organization and the , including the International Classification of Diseases (ICD). Its work began in earnest in 1951 after a significant infusion of financial and technical resources. The WHO's mandate seeks and includes: working worldwide to promote health, keeping the world safe, and serve the vulnerable. It advocates that a billion more people should have: universal health care ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotherapy
Combination therapy or polytherapy is therapy that uses more than one medication or modality. Typically, the term refers to using multiple therapies to treat a ''single'' disease, and often all the therapies are pharmaceutical (although it can also involve non-medical therapy, such as the combination of medications and talk therapy to treat depression). 'Pharmaceutical' combination therapy may be achieved by prescribing/administering separate drugs, or, where available, dosage forms that contain more than one active ingredient (such as fixed-dose combinations). Polypharmacy is a related term, referring to the use of multiple medications (without regard to whether they are for the same or separate conditions/diseases). Sometimes "polymedicine" is used to refer to pharmaceutical combination therapy. Most of these kinds of terms lack a universally consistent definition, so caution and clarification are often advisable. Uses Conditions treated with combination therapy include tubercu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pharmacokinetic
Pharmacokinetics (from Ancient Greek ''pharmakon'' "drug" and ''kinetikos'' "moving, putting in motion"; see chemical kinetics), sometimes abbreviated as PK, is a branch of pharmacology dedicated to determining the fate of substances administered to a living organism. The substances of interest include any chemical xenobiotic such as: pharmaceutical drugs, pesticides, food additives, cosmetics, etc. It attempts to analyze chemical metabolism and to discover the fate of a chemical from the moment that it is administered up to the point at which it is completely eliminated from the body. Pharmacokinetics is the study of how an organism affects a drug, whereas pharmacodynamics (PD) is the study of how the drug affects the organism. Both together influence dosing, benefit, and adverse effects, as seen in PK/PD models. Overview Pharmacokinetics describes how the body affects a specific xenobiotic/chemical after administration through the mechanisms of absorption and distributi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
