There are no clear studies showing that taking Ermiao Pills will delay periods. Ermiao Pills are composed of Cangzhu and Huangbai. It has the effect of clearing heat and drying dampness. It is used for dampness-heat infiltration (dampness and heat evils invading the intestines, bladder, pubic area, lower limbs, etc.), leucorrhea, and scrotal wetness and itching. Adverse effects and contraindications of the drug are not clear. Delayed menstruation is mostly due to blood deficiency and blood stasis. In Ermiao Pill, Huangbai clears heat and dries dampness, diarrhea and detoxification, and retreats deficiency fire; Cangzhu dries dampness and strengthens the spleen to dispel wind-dampness. It does not cause blood deficiency and blood stasis, so it can not be said that Ermiao Pills will delay menstruation. If the menstrual period is delayed, it is recommended to maintain a comfortable mood, it is recommended to go to the hospital in a timely manner under the guidance of a professional physician to identify and analyze the treatment and medication, do not take medication on their own, so as not to delay the condition, affecting the recovery of the disease.