(2) Compared with similar Chinese patent medicines, Sanjin tablets are made of whole extract, which is easy to be absorbed in the body and has a rapid improvement effect on urinary tract irritation symptoms such as urgency, frequent micturition and dysuria. In addition, the retail price of drugs and the daily medication cost of patients are cheaper, and the cost performance of drugs is superior. Brand awareness, brand image, market base and product coverage in OTC market are better than similar Chinese patent medicines. It is the first brand and the only national brand of Chinese patent medicine against urinary tract infection in China. Its sales history of nearly 40 years is enduring.