Lock yang in the correct dosage under the doctor’s instructions to take generally no obvious side effects, if the yin deficiency Yang Wang patients use may cause dry stools, hyperactivity of the symptoms of aggravation and other discomforts. Lock Yang belongs to the Chinese medicine, has the kidney to help Yang, laxative effect, can be used to treat foot impotence tendon soft, impotence, intestinal dryness constipation and other diseases. Clinically, lock yang can be used with dragon bone, cuttlebone and poria to treat kidney deficiency, spermatorrhea, lumbar and knee soreness and weakness (lumbar and knee soreness and weakness), etc.; with mulberry seeds, it can be used to treat old age, weak qi and yin deficiency, stool dryness, etc.. Adverse effects of lock yang are still unclear, and it is not recommended for people with yin deficiency and yang exuberance, spleen deficiency and diarrhea (diarrhea caused by weak spleen function), or solid heat constipation. If there is any discomfort, it is recommended to consult a traditional Chinese medicine practitioner for standardized treatment under the guidance of evidence-based treatment to avoid delaying the condition.