Returning to breast milk is a process that is required to stop milk production when a woman stops breastfeeding. Carmegoline is able to inhibit milk production, but its side effects are high and it is not recommended to use it to return to breast milk. Carmegoline is mainly used in the treatment of Parkinson’s disease and symptoms of disorders related to hyperlactatemia, but can also be used to inhibit physiological lactation. The drug has a long duration of action, and to achieve the effect of milk return, it is usually necessary to take only two days, but after taking the drug should not be breastfeeding. However, there are more side effects of ergometrine, and after taking it, you may experience lower blood pressure, dizziness, headache, nausea, insomnia, abdominal pain, gastritis, weakness, and other discomforts. It is contraindicated for those who are allergic to ergoline and ergot derivatives, as well as those with a history of postpartum psychosis, and those with liver insufficiency. Therefore, it is not recommended to take ergometrine to regain breast milk, if you need to take it, you must strictly follow the doctor’s instructions to prevent adverse reactions.