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Bromocriptine is a polypeptide ergot derivative that mimics the activity of dopamine. It is used as a fertility drug to treat infertility caused by high prolactin levels.12

Bromocriptine acts on the pituitary gland, where it imitates the effects of dopamine. Elevated prolactin levels can disrupt fertility by suppressing the release of gonadotropin-releasing hormone (GnRH), which interferes with follicle-stimulating hormone (FSH) and luteinizing hormone (LH), ultimately preventing ovulation and reducing testosterone and sperm production. By simulating dopamine, bromocriptine helps to restore GnRH signaling and normalize prolactin levels.2

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