Vitamin B6 back milk is mainly through promoting the increase of dopamine receptors in the brain, effectively reducing the secretion of pituitary prolactin and achieving the effect of milk withdrawal. However, the dose of vitamin B6 is relatively high, and some people may experience side effects after taking it, such as dizziness and gastrointestinal reactions. The dose of vitamin B6 needs to be reasonably applied under the guidance of a doctor, and the dose is relatively high at the beginning, after which the dose needs to be gradually reduced until the secretion of milk stops. Breastfeeding women can also take other methods to return milk, such as drinking less nutritious soups and avoiding baby sucking stimulation on the nipple. You can drink decoction of barley sprouts or apply hot compresses to both breasts with mannitol to return milk, etc. You should also pay attention to keeping your breasts clean and hygienic during the return period.