Cabergoline (brand names Dostinex® and Cabaser®), an ergot-derivative, is a potent dopamine receptor agonist on D2-Receptors. It also acts on dopamine-receptors in lactophilic hypothalamus cells and causes thereby a suppression of the prolactin-production in pituitary gland.
Pharmacokinetics
Following an oral single dose the drug is resorbed within 0.5 to 4 hours from the GI-Tract with considerable interindividual differences. Meals do not alter the absorption characteristic. Human bioavailibility was not determined, because the drug is intended for oral use only. In mice and rats the absolute bioavailability was 30 and 63%, respectively. Cabergoline is rapidly and to a great extent metabolized in the liver and excreted in bile and far less in urine. All metabolites are less active than the parental drug or inactive. The human elimination halflife is estimated to be 63 to 68 hours in patients with M. Parkinson and 79 to 115 hours in patients with pituitary tumors.
Carcinogenity
In rodents a dose dependent increase in malignant tumors has been found. They are thought to be species-specific. No clinical data exists on carcinogenity in humans.
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MedlinePlus: Cabergoline (Systemic) - Provides information on usage, precautions, side effects and brand names when available. Data provided by government agencies and health-related organizations.
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