Domestic and foreign bio companies have started to develop Xolair (Omalizumab) biosimilars which patents expire in two years. The development stage of Celltrion, a domestic company, is the fastest. According to Clinical Trials, a clinical registration site of the NIH on the 17th, six clinical trials of Xolair biosimilars are currently registered. Three companies, Celltrion, Theba in the UK, and CSPC in China, are conducting phase 3 clinical trials, while three are in phase 1 clinical trials, including Zhejiang Huahai Pharmaceutical in China, Generium in Russia, and Syneos Health in the United States.

Xolair is a treatment for allergic asthma and chronic urticaria. It was jointly developed by Genentech a