Bromocriptine is the first choice for prolactinomatous pituitary tumors. Patients often ask how much bromocriptan should be taken. You can start with 2 tablets per day to observe the side effects of the drug on the gastrointestinal tract, and then recheck the lactogen after one month to understand the role of the drug in lowering lactogen. We can check lactogen once a month and adjust the dosage of bromocriptan according to the value. The principle is to control prolactin to normal level with the smallest dose.