How long does it take to work depends on the severity of the condition, usually it takes about a month, but the details need to follow medical advice. The main ingredients are black ants, wolfberries, Epimedium and other Chinese herbs, which have the function of tonifying the kidneys and strengthening the yang and benefiting the essence. Under the guidance of a doctor, it can improve impotence and premature ejaculation, cold extremities, weakness of the waist and knees, and sexual dysfunction caused by kidney deficiency, and the general course of treatment is four weeks. However, some patients may experience nausea, vomiting, gastric distension, heartburn and other symptoms after taking Compound Xuanju Capsules. It is best to reduce the dosage or take it after meals, which can effectively reduce the occurrence of gastrointestinal discomfort symptoms. As this medicine is not recommended for long-term use, and is not recommended for people with yin deficiency and fire, or those who are allergic to compound Xuanju capsule, patients must go to a Chinese medicine department for evidence-based treatment before use to ensure more accurate efficacy.