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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]
There are few treatments which increase prolactin levels in humans. Treatment differs based on the reason for diagnosis. Women who are diagnosed with hypoprolactinemia following lactation failure are typically advised to formula feed, although treatment with metoclopramide has been shown to increase milk supply in clinical studies.
After delivery, progesterone concentrations decrease, and prolactin levels drop. Only during nipple stimulation will prolactin levels rise, allowing for milk production. [22] At 6 weeks post-birth (postpartum), estradiol concentrations decrease, and prolactin concentrations return to normal even during breastfeeding.
Prolactin has a wide variety of effects. It stimulates the mammary glands to produce milk (): increased serum concentrations of prolactin during pregnancy cause enlargement of the mammary glands and prepare for milk production, which normally starts when levels of progesterone fall by the end of pregnancy and a suckling stimulus is present.
Quinagolide (INN Tooltip International nonproprietary name, BAN Tooltip British Approved Name), sold under the brand name Norprolac, is a selective dopamine D 2 receptor agonist which is used to reduce elevated levels of prolactin (hyperprolactinemia). [1] It has also been found to be effective in the treatment of breast pain. [2]
Abnormal levels of certain neurotransmitters, such as serotonin Changes in levels of certain hormones, such as prolactin or luteinizing hormone (LH) Mental health issues, such as depression ...
Across multiple species and in some cases across sexes, there is evidence for the phylogenetic conservation of parental hormones. These include the relationships between the hormones estrogen, progesterone, prolactin, and oxytocin. In males across species, including humans, increased prolactin levels are associated with fatherhood.
In one study of men aged 65 years and over, those with lower testosterone levels experienced reduced sleep efficiency, woke up more in the middle of the night, and had less time in slow-wave sleep ...