How many courses of treatment should be taken in general, can not be generalized, the specific taking how long needs to be combined with the patient’s condition. From clinical experience, generally can be taken about 2~4 weeks to see the first results. Retention of urine is a Chinese patent medicine, composed of tonic bone resin, motherwort, Hai Jin Sha, amber, shan ci mushrooms and other ingredients, the efficacy of warming the kidneys and transforming qi, clearing heat and water, activating blood circulation to eliminate blood stasis, and dispersing knots and relieving pain. The drug is mainly used to treat retention of urine due to insufficiency of kidney qi and obstruction of dampness and heat (the accumulation of dampness and heat evils to form stasis), with specific symptoms such as lumbar and knee soreness, frequent urination, urgency of urination, yellow urine, blood in urine, pain in urine, and thin urine line, etc. It also has a certain therapeutic effect on people with prostatic hyperplasia accompanied by the above mentioned symptoms. Adverse reactions of urine retention Shu capsule after taking the drug may appear stomach discomfort, mild diarrhea and other discomforts, but generally does not affect the treatment, contraindications are not yet clear. If there is a need for medication, it should be used under the guidance of a doctor, and should not be used blindly, so as not to cause adverse consequences.