Hyperprolactinaemia is a common side effect of some antipsychotics (APS), including some atypicals. Clinical consequences of hyperprolactinaemia are broad including amenorrhea, galactorrhea, tender breasts, gynecomastia and sexual dysfunction. Less known but also present is the increased cardiovascular risk, specially in women, disorders of osteoporotic type and a potential increased risk of breast and prostate cancer.