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Bromocriptine, originally marketed as Parlodel and subsequently under many brand names, [1] is an ergoline derivative and dopamine agonist that is used in the treatment of pituitary tumors, Parkinson's disease, hyperprolactinaemia, neuroleptic malignant syndrome, and, as an adjunct, type 2 diabetes.
Bromocriptine is a D 2 receptor agonist and D 1 receptor antagonist with a binding affinity to D 2 receptors of anterior pituitary cells, exclusively on lactotrophs. Bromocriptine stimulates Na +, K +-ATPase activity and/or cytosolic Ca 2+ elevation and therefore reduction of prolactin which leads to no production of cAMP.
Prolactin inhibitors are mainly used to treat hyperprolactinemia (high prolactin levels). [1] Agonists of the dopamine D 2 receptor such as bromocriptine and cabergoline are able to strongly suppress pituitary prolactin secretion and thereby decrease circulating prolactin levels, and so are most commonly used as prolactin inhibitors. [1]
Cabergoline is frequently used as a first-line agent in the management of prolactinomas due to its higher affinity for D 2 receptor sites, less severe side effects, and more convenient dosing schedule than the older bromocriptine, though in pregnancy bromocriptine is often still chosen since there is less data on safety in pregnancy for ...
Methylergometrine is sometimes used for both prevention [6] and acute treatment [7] of migraine. It is an active metabolite of methysergide. [8] In the treatment of cluster headaches, methylergometrine has been initiated at a dose of 0.2 mg/day, rapidly increased to 0.2 mg three times per day, and increased to a maximum of 0.4 mg three times per day.
Ergotamine interacts with serotonin, adrenergic, and dopamine receptors. [17] [18] It is an agonist of serotonin receptors including the 5-HT 1 and 5-HT 2 subtypes. [17]Ergotamine is an agonist of the serotonin 5-HT 2B receptor and has been associated with cardiac valvulopathy. [19]
Pergolide, sold under the brand name Permax and Prascend (veterinary) among others, is an ergoline-based dopamine receptor agonist used in some countries for the treatment of Parkinson's disease.
Dopamine, sold under the brand name Intropin among others, is a medication most commonly used in the treatment of very low blood pressure, a slow heart rate that is causing symptoms, and, if epinephrine is not available, cardiac arrest. [4]
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