After taking birth control pills, if your menstrual flow becomes very little, what medicine should you take to regulate it?

Patient's question:

Taking emergency contraception, with a two-day period and light flow

Doctor's answer:

Irregular menstruation has many causes, which are typically classified into two major categories in clinical practice: one is functional, such as irregular menstruation caused by endocrine dysfunction; the other is organic, such as conditions like pelvic inflammatory disease, endometritis, and endometriosis, which can also lead to irregular menstruation.
Go to the hospital for a check-up and take medication based on your symptoms. In your daily life, eat more foods that boost qi and blood, or use traditional Chinese medicine for regulating menstruation, such as angelica sinensis (Dang Gui), astragalus (Huang Qi), and Leonurus japonicus (Yi Mu Cao). Drink plenty of water, eat less spicy and irritating foods, pay attention to a balanced diet, and exercise more.
Wishing you good health.