How long does it take to work with mugwort pills can’t be generalized, it depends on the patient’s specific condition as well as the sensitivity and absorption level of the drug. It is often used to treat irregular menstruation and dysmenorrhea caused by blood deficiency and qi stagnation or lower jiao deficiency and cold, especially for women with uterine cold. Generally speaking, if it is used for treating dysmenorrhea, patients can start taking it 3-5 days before the onset of menstruation, and it can usually be taken continuously for 1 week to bring about significant improvement. If it is used for a long period of time, it can be taken on the 5th day of the menstrual period, and it can be taken until the next menstrual period, usually for 1-3 months. However, due to the different degree of sensitivity and absorption of each individual, the exact time of onset of effect cannot be determined. In addition, patients should avoid eating cold food during the period of taking Euphorbia Nunnery Pill, and should have good habits of life and rest to ensure sufficient sleep.