Bailing capsule is fermented Cordyceps sinensis powder. Bailing capsule has various effects such as tonifying the kidney, nourishing the essence, antioxidant, improving lung function and kidney protection. Clinically, Bailing Capsules are mainly used for the treatment of cough, asthma, lumbago and back pain caused by deficiency of both lung and kidney, and can also be used as an adjunctive treatment for chronic bronchitis. The side effects of Bailing Capsules are mainly irritation to the gastrointestinal tract and allergic reactions. Bailing Capsules can cause throat discomfort, nausea, vomiting, loss of appetite and other symptoms. For patients who are allergic to Bailing Capsule or have allergies, allergic reactions such as rash and itching may occur during taking the medicine. Because of the tonic effect of Bailing Capsule, it is not easy to take it for patients with Yin deficiency and fire, stomach heat, accumulated food, lung phlegm and heat, and cold and fever, and avoid taking indigestible food during the medication period.