Causes of Hyperprolactinaemia	

The causes of hyperprolactinaemia may be considered, in a simplified fashion, as resulting from four basic disorders of the prolactin secretion mechanism:

• Hypothalamic dopamine deficiency
• Defective dopamine delivery
• Lactotroph insensitivity to dopamine
• Stimulation of lactotroph cells

In some patients, however, it is not possible to elucidate the cause of hyperprolactinaemia.