Semaglutide
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Semaglutide
Semaglutide, sold under the brand names Ozempic, Wegovy and Rybelsus, is an antidiabetic medication used for the treatment of type 2 diabetes and as anti-obesity medication for long-term weight management, developed by Novo Nordisk in 2012. Semaglutide is a GLP-1 receptor agonist, meaning that it mimics the action of the human incretin glucagon-like peptide-1 (GLP-1), thereby increasing insulin secretion and increasing blood sugar disposal and improving glycemic control. Side effects include nausea, vomiting, diarrhea, abdominal pain, and constipation. In December 2017, the injectable version named Ozempic was approved, in September 2019, a version which can be taken by mouth (Rybelsus) was approved, and in June 2021, a higher-dose injection sold under the brand name Wegovy for long-term weight management in adults was approved by the US Food and Drug Administration (FDA). In 2020, semaglutide was the 129th most commonly prescribed medication in the United States, with m ...
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Anti-obesity Medication
Anti-obesity medication or weight loss medications are pharmacological agents that reduce or control weight. These medications alter one of the fundamental processes of the human body, weight regulation, by altering either appetite, or absorption of calories. The main treatment modalities for overweight and individuals with obesity remain dieting ( healthy diet and caloric restriction) and physical exercise. In the United States orlistat (Xenical) and semaglutide (Wegovy) are currently approved by the FDA for long-term use. Xenical reduces intestinal fat absorption by inhibiting pancreatic lipase; Wegovy is a GLP-1 analogue, a class of drugs that is relatively recent and which has promise as an effective anti-obesity measure. Because of potential side effects, and limited evidence of small benefits in weight reduction for children and adolescents with obesity, it is recommended that anti-obesity medications only be prescribed for obesity where it is hoped that the benefits of ...
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Tirzepatide
Tirzepatide, sold under the brand name Mounjaro, is an antidiabetic medication used for the treatment of type 2 diabetes. Tirzepatide is given by weekly subcutaneous injection (under the skin). The most common side effects include nausea, vomiting, diarrhea, decreased appetite, constipation, upper abdominal discomfort, and abdominal pain. Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are hormones involved in blood sugar control. Tirzepatide is a first-in-class medication that activates both the GLP-1 and GIP receptors. It is a GIP-analogue that activates both the GLP-1 and GIP receptors, leading to improved blood sugar control. Tirzepatide was approved for medical use in the United States in May 2022, in the European Union in September 2022, in Canada in November 2022, and in Australia in December 2022. The US Food and Drug Administration (FDA) considers it to be a first-in-class medication. Medical uses Tirzepatide is indicated to ...
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Antidiabetic Medication
Drugs used in diabetes treat diabetes mellitus by altering the glucose level in the blood. With the exceptions of insulin, most GLP receptor agonists (liraglutide, exenatide, and others), and pramlintide, all are administered orally and are thus also called oral hypoglycemic agents or oral antihyperglycemic agents. There are different classes of anti-diabetic drugs, and their selection depends on the nature of the diabetes, age and situation of the person, as well as other factors. Diabetes mellitus type 1 is a disease caused by the lack of insulin. Insulin must be used in type 1, which must be injected. Diabetes mellitus type 2 is a disease of insulin resistance by cells. Type 2 diabetes mellitus is the most common type of diabetes. Treatments include agents that (1) increase the amount of insulin secreted by the pancreas, (2) increase the sensitivity of target organs to insulin, (3) decrease the rate at which glucose is absorbed from the gastrointestinal tract, and (4) incre ...
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GLP-1 Receptor Agonist
Glucagon-like peptide-1 receptor agonists, also known as GLP-1 receptor agonists (GLP-1-RA) or incretin mimetics, are agonists of the glucagon-like peptide 1 receptor, GLP-1 receptor. This class of medications is used for the treatment of diabetes mellitus type 2, type 2 diabetes Some drugs are also approved for obesity. One of their advantages over older anti-diabetic medication#Secretagogues, insulin secretagogues, such as sulfonylureas or meglitinides, is that they have a lower risk of causing hypoglycemia. GLP-1 has a short duration of action, so to overcome this limitation several modifications in either the drugs or the formulations are being developed. The 2022 American Diabetes Association, ADA standards of medical care in diabetes include GLP-1-RA as a first line pharmacological therapy for type 2 diabetes, specifically in patients with atherosclerotic cardiovascular disease or obesity. Health effects A 2021 meta-analysis found a 12% reduction in all-cause mortality when G ...
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Subcutaneous Injection
Subcutaneous administration is the insertion of medications beneath the skin either by injection or infusion. A subcutaneous injection is administered as a bolus into the subcutis, the layer of skin directly below the dermis and epidermis, collectively referred to as the cutis. The instruments are usually a hypodermic needle and a syringe. Subcutaneous injections are highly effective in administering medications such as insulin, morphine, diacetylmorphine and goserelin. Subcutaneous administration may be abbreviated as SC, SQ, subcu, sub-Q, SubQ, or subcut. Subcut is the preferred abbreviation to reduce the risk of misunderstanding and potential errors. Subcutaneous tissue has few blood vessels and so drugs injected here are for slow, sustained rates of absorption, often with some amount of depot effect. Compared with other routes of administration, it is slower than intramuscular injections but still faster than intradermal injections. Subcutaneous infusion (as opposed ...
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Blood Sugar Level
Glycaemia, also known as blood sugar level, blood sugar concentration, or blood glucose level is the measure of glucose concentrated in the blood of humans or other animals. Approximately 4 grams of glucose, a simple sugar, is present in the blood of a 70 kg (154 lb) human at all times. The body tightly regulates blood glucose levels as a part of metabolic homeostasis. Glucose is stored in skeletal muscle and liver cells in the form of glycogen; in fasting individuals, blood glucose is maintained at a constant level at the expense of glycogen stores in the liver and skeletal muscle. In humans, a blood glucose level of 4 grams, or about a teaspoon, is critical for normal function in a number of tissues, and the human brain consumes approximately 60% of blood glucose in fasting, sedentary individuals. A persistent elevation in blood glucose leads to glucose toxicity, which contributes to cell dysfunction and the pathology grouped together as complications of diabetes. Gl ...
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Retinopathy
Retinopathy is any damage to the retina of the eyes, which may cause vision impairment. Retinopathy often refers to retinal vascular disease, or damage to the retina caused by abnormal blood flow. Age-related macular degeneration is technically included under the umbrella term retinopathy but is often discussed as a separate entity. Retinopathy, or retinal vascular disease, can be broadly categorized into proliferative and non-proliferative types. Frequently, retinopathy is an ocular manifestation of systemic disease as seen in diabetes or hypertension. Diabetes is the most common cause of retinopathy in the U.S. as of 2008. Diabetic retinopathy is the leading cause of blindness in working-aged people. It accounts for about 5% of blindness worldwide and is designated a priority eye disease by the World Health Organization. Signs and symptoms Many people often do not have symptoms until very late in their disease course. Patients often become symptomatic when there is irreversible ...
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Pancreatitis
Pancreatitis is a condition characterized by inflammation of the pancreas. The pancreas is a large organ behind the stomach that produces digestive enzymes and a number of hormones. There are two main types: acute pancreatitis, and chronic pancreatitis. Signs and symptoms of pancreatitis include pain in the upper abdomen, nausea and vomiting. The pain often goes into the back and is usually severe. In acute pancreatitis, a fever may occur, and symptoms typically resolve in a few days. In chronic pancreatitis weight loss, fatty stool, and diarrhea may occur. Complications may include infection, bleeding, diabetes mellitus, or problems with other organs. The two most common causes of acute pancreatitis are a gallstone blocking the common bile duct after the pancreatic duct has joined; and heavy alcohol use. Other causes include direct trauma, certain medications, infections such as mumps, and tumors. Chronic pancreatitis may develop as a result of acute pancreatitis. It is mos ...
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Thyroid C Cell Tumor
Medullary thyroid cancer is a form of thyroid carcinoma which originates from the parafollicular cells (C cells), which produce the hormone calcitonin.Hu MI, Vassilopoulou-Sellin R, Lustig R, Lamont JP"Thyroid and Parathyroid Cancers"in Pazdur R, Wagman LD, Camphausen KA, Hoskins WJ (EdsCancer Management: A Multidisciplinary Approach 11 ed. 2008. Medullary tumors are the third most common of all thyroid cancers and together make up about 3% of all thyroid cancer cases. MTC was first characterized in 1959. Approximately 25% of medullary thyroid cancer cases are genetic in nature, caused by a mutation in the RET proto-oncogene. When MTC occurs by itself it is termed sporadic medullary thyroid cancer. Medullary thyroid cancer is seen in people with multiple endocrine neoplasia type 2A and 2B. When medullary thyroid cancer due to a hereditary genetic disorder occurs without other endocrine tumours it is termed familial medullary thyroid cancer. Signs and symptoms The major clinical ...
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Men2
Multiple endocrine neoplasia type 2 (also known as "Pheochromocytoma and amyloid producing medullary thyroid carcinoma", "PTC syndrome," and "Sipple syndrome") is a group of medical disorders associated with tumors of the endocrine system. The tumors may be benign or malignant (cancer). They generally occur in endocrine organs (e.g. thyroid, parathyroid, and adrenals), but may also occur in endocrine tissues of organs not classically thought of as endocrine. MEN2 is a sub-type of MEN (multiple endocrine neoplasia) and itself has sub-types, as discussed below. Signs and symptoms MEN2 can present with a sign or symptom related to a tumor or, in the case of multiple endocrine neoplasia type 2b, with characteristic musculoskeletal and/or lip and/or gastrointestinal findings. Medullary thyroid carcinoma (MTC) represents the most frequent initial diagnosis. Occasionally pheochromocytoma or primary hyperparathyroidism may be the initial diagnosis. Pheochromocytoma occurs in 33-50% o ...
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Glucagon
Glucagon is a peptide hormone, produced by alpha cells of the pancreas. It raises concentration of glucose and fatty acids in the bloodstream, and is considered to be the main catabolic hormone of the body. It is also used as a Glucagon (medication), medication to treat a number of health conditions. Its effect is opposite to that of insulin, which lowers extracellular glucose. It is produced from proglucagon, encoded by the ''GCG'' gene. The pancreas releases glucagon when the amount of glucose in the bloodstream is too low. Glucagon causes the liver to engage in glycogenolysis: converting stored glycogen into glucose, which is released into the bloodstream. High blood-glucose levels, on the other hand, stimulate the release of insulin. Insulin allows glucose to be taken up and used by insulin-dependent tissues. Thus, glucagon and insulin are part of a feedback system that keeps blood glucose levels stable. Glucagon increases energy expenditure and is elevated under conditions of ...
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Beta Cells
Beta cells (β-cells) are a type of cell found in pancreatic islets that synthesize and secrete insulin and amylin. Beta cells make up 50–70% of the cells in human islets. In patients with Type 1 diabetes, beta-cell mass and function are diminished, leading to insufficient insulin secretion and hyperglycemia. Function The primary function of a beta cell is to produce and release insulin and amylin. Both are hormones which reduce blood glucose levels by different mechanisms. Beta cells can respond quickly to spikes in blood glucose concentrations by secreting some of their stored insulin and amylin while simultaneously producing more. Primary cilia on beta cells regulate their function and energy metabolism. Cilia deletion can lead to islet dysfunction and type 2 diabetes. Insulin synthesis Beta cells are the only site of insulin synthesis in mammals. As glucose stimulates insulin secretion, it simultaneously increases proinsulin biosynthesis, mainly through translational cont ...
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