What Happens When Prolactin Levels Are High?

Excess prolactin can cause the production of breast milk in men and in women who are not pregnant or breastfeeding. In women, too much prolactin can also cause menstrual problems and infertility (the inability to get pregnant). In men, it can lead to lower sex drive and erectile dysfunction (ED).

What are the side effects of high prolactin levels?

Symptoms include irregular or absent menstrual periods, infertility, menopausal symptoms (hot flashes and vaginal dryness), and, after several years, osteoporosis (thinning and weakening of the bones). High prolactin levels can also cause milk discharge from the breasts.

What is the cause of high prolactin in a woman?

Certain medications can also cause higher prolactin levels. Symptoms of high prolactin include sexual and menstrual problems, infertility, breast milk leakage, and others. The condition can be diagnosed with a blood test. In some cases, an MRI may be needed.