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Orexin (/ ɒ ˈ r ɛ k s ɪ n /), also known as hypocretin, is a neuropeptide that regulates arousal, wakefulness, and appetite. [5] It exists in the forms of orexin-A and orexin-B.The most common form of narcolepsy, type 1, in which the individual experiences brief losses of muscle tone ("drop attacks" or cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells ...
An orexin receptor antagonist, or orexin antagonist, is a drug that inhibits the effect of orexin by acting as a receptor antagonist of one (selective orexin receptor antagonist or SORA) or both (dual orexin receptor antagonis or DORA) of the orexin receptors, OX 1 and OX 2. [1] Medical applications include treatment of sleep disorders such as ...
An orexigenic, or appetite stimulant, is a drug, hormone, or compound that increases appetite and may induce hyperphagia.This can be a medication or a naturally occurring neuropeptide hormone, such as ghrelin, orexin or neuropeptide Y, [1] [2] which increases hunger and therefore enhances food consumption.
Lemborexant is used in the treatment of insomnia in adults. [3]A major systematic review and network meta-analysis of medications for the treatment of insomnia published in 2022 found that lemborexant had an effect size (standardized mean difference (SMD)) against placebo for treatment of insomnia at 4 weeks of 0.36 (95% CI Tooltip confidence interval 0.08 to 0.63) and at 3 months of 0.41 (95% ...
Orexin receptor antagonists can affect the reward system and produce drug-liking responses in humans. [ 27 ] [ 16 ] Daridorexant at a dose of 50 mg (the maximum recommended dose) showed significantly greater drug liking than placebo but significantly less drug liking than zolpidem (30 mg) and suvorexant (150 mg) in recreational sedative drug users.
Medication costs can be the selling price from the manufacturer, that price together with shipping, the wholesale price, the retail price, and the dispensed price. [3]The dispensed price or prescription cost is defined as a cost which the patient has to pay to get medicines or treatments which are written as directions on prescription by a prescribers. [4]
However, orexin-B shows a 5- to 10-fold selectivity for orexin receptor type 2, whilst orexin-A is equipotent at both receptors. [2] [3] Several orexin receptor antagonists are in development for potential use in sleep disorders. [4] The first of these, suvorexant, has been on the market in the United States since 2015. [5]
Orexin receptor type 2 (Ox2R or OX 2), also known as hypocretin receptor type 2 (HcrtR2), is a protein that in humans is encoded by the HCRTR2 gene. [5] It should not be confused for the protein CD200R1 which shares the alias OX2R but is a distinct, unrelated gene located on the human chromosome 3.