Kidney tonic medicines can be categorized into those that nourish kidney yin and those that warm kidney yang. Warming and tonifying drugs are recommended to be taken in the morning, while tonifying drugs are recommended to be taken in the evening. According to Chinese medicine theory, yang qi is gradually exuberant in the morning, and at noon, the yang qi in nature reaches its peak. The yang qi in the human body echoes the changes in yang qi in nature. Therefore, taking warm kidney yang medicines in the morning can work better. Kidney yang deficiency patients are often accompanied by cold, cold limbs, pale face, urine clear and long, etc. Women will also appear to appear to be cold infertility, with thin, pale tongue, thin white moss, etc.; men may appear to impotence, premature ejaculation, etc., kidney yang deficiency patients can be in the morning to take warm tonic kidney yang medicines. From midday to evening, yang qi gradually weakens. In the evening, yang energy is in a state of astringency, and yin energy in nature is hyperactive. It is recommended to be accompanied by dizziness and tinnitus, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee areas), insomnia and dreaminess, etc. Men may experience symptoms of impotence, premature ejaculation and spermatorrhea. Patients with kidney yin deficiency whose women will experience symptoms such as decreased menstruation, metrorrhagia (excessive or spotty menstruation), hot flashes and night sweats (abnormal sweating after going to sleep, sweating stops after waking up), etc., can use medicines to nourish kidney yin in the evening. In addition, it is better for patients to take the medication half an hour after meals, which can reduce the stimulation of the medication on the stomach and intestines. It is recommended that patients should follow the doctor’s instructions to take medication, and avoid blindly taking medication, so as not to cause adverse reactions.