"Efficacy and safety of the Qiguiyin formula in severe pneumonia: study protocol for a randomized, double-blind, placebo-controlled clinical trial".

The protocol has been approved by the Research Ethics Committee of Beijing Hospital of Traditional Chinese Medicine, Affiliated with Capital Medical University (2018BL- 053-02). This trial aims to provide evidence for QGY formula combined with conventional therapy in treating patients with severe bacterial pneumonia, and to verify the clinical effectiveness and safety of QGY formula in China compared with placebo. Additionally, this trial will reveal the effect of QGY formula on delaying/reversing the characteristics of drug-resistant bacteria.