Figure 5. Changes in serum prolactin levels after bromocriptine administration. The effect on serum prolactin levels throughout the day of a single 2.5mg oral dose of bromocriptine at 09.00h is shown. Case 1 is the patient whose visual field chart and CT scans are shown in Figures 3 & 4. Case 2 is a patient with a similar problem. In patients such as these, even when prolactin levels do not come down to the normal range, gonadal function is usually restored.Reproduced with permission from J Clin Endocrinol Metab 51:438 445.