In clinical practice, if you take the pill to regulate irregular periods, there are certain side effects, because any drug has certain side effects, and the pill is a combination of estrogen and progestin. In the clinic, if the irregular menstruation is regulated by the pill, the following hazards may occur: First, it may cause a decrease in menstrual volume, because the short-acting contraceptive pill is mainly a combination of estrogen and progestin in the clinic, after taking it, the menstrual cycle can return to normal, but the endometrium will become thinner, so there will be a decrease in menstrual volume. Secondly, because it is a combination of estrogen and progestin, there is a possibility that weight gain will occur clinically, for example, because having estrogen will lead to water and sodium retention, so you will gain weight. Thirdly, if the pill is used for a long time to adjust menstruation, there is a possibility that discoloration on the face may occur.