This center intends to conduct a single-center, randomized, placebo-controlled study to evaluate the effectiveness and safety of Nintedanib ethanesulfonate soft capsule in the treatment of pulmonary fibrosis in patients with moderate to severe COVID-19. The number of cases is estimated based on the following:~This exploratory trial is expected to complete 80 case studies (randomly divided into control group and test group each with 40 cases), and the expected drop-out rate is not more than 20%, so the total number of cases is 96. Placebo control group:~Empty capsules with the same appearance and ingredients as Nintedanib soft capsules: one capsule at a time, twice a day, with an interval of about 12 hours each time. Continuous medication for 8 weeks.~Nintedanib Nintedanib cloth sulfonate soft capsule treatment: According to the drug manual recommendation, give Nintedanib cloth sulfonate soft capsule 150mg twice daily with an interval of about 12 hours each time, with food. Continuous medication for 8 weeks.
This center intends to conduct a single-center, randomized, placebo-controlled study to evaluate the effectiveness and safety of Nintedanib ethanesulfonate soft capsule in the treatment of pulmonary fibrosis in patients with moderate to severe COVID-19.