Walker S, Groom G, Davis R H, Hibbard B M, Griffiths K
Lancet. 1975 Nov 1;2(7940):842-4. doi: 10.1016/s0140-6736(75)90235-4.
2-bromo-alpha-ergocryptine (bromocriptine) in a dosage of 2-5 mg twice daily caused a rapid fall in plasma prolactin. It was more effective than either a single dose of 4 mg quinoestrol or a placebo in suppressing puerperal lactation, as judged by milk flow and the relief of breast pain and congestion. Patients who received quinoestrol were more comfortable than those who received placebo.