There are no major drawbacks to vitamin B6 milk return, but the specifics will vary from person to person. A small percentage of patients may experience stomach irritation when taking vitamin B6, manifesting as dizziness, nausea and other uncomfortable symptoms, so it should be used with caution in cases of stomach problems. Vitamin B6 is mainly through the inhibition of the secretion of pituitary lactogen to achieve the effect of returning milk. Vitamin B6 is a water-soluble vitamin, which can be excreted in the body through urine and will not accumulate, and the time to use vitamin B6 for milk return is relatively short, and there will not be a lot of use, and most patients can return milk clean within a week. If the effect of vitamin B6 is not good, further hospital consultation is needed to give further treatment.