It can warm kidney yang, fill sperm and stop seminal emission. It is suitable for the treatment of impotence, premature ejaculation, sexual dysfunction, soreness of the waist and knees, lack of energy, fear of cold, loose stools, frequent and clear urination caused by kidney deficiency. Four weeks is generally a course of treatment, but for specific dosage and usage, it is recommended to consult a doctor at the Department of Urology or Chinese Medicine and apply under the guidance of a doctor. Patients with kidney yang deficiency should pay attention to abstaining from sex, avoiding cold and spicy stimulating foods, keeping warm, ensuring sufficient rest time, and exercising appropriately while taking Dougui Capsules, all of which can help improve symptoms.