Dermatomyositis complicated with interstitial pneumonia is mainly treated by drugs, commonly used glucocorticosteroids such as prednisone, anti-pulmonary fibrosis drugs such as pirfenidone, immunosuppressants such as cyclophosphamide, antibiotics such as penicillin. If it is chronic interstitial pneumonia and causes dyspnea during activity, it can be treated with glucocorticosteroids such as prednisone, hydrocortisone, etc., and anti-pulmonary fibrosis drugs such as pirfenidone, etc., and immunosuppressants such as cyclophosphamide and azathioprine are used for the treatment of dermatomyositis as the primary disease. If interstitial pneumonia is caused by secondary infection of dermatomyositis, antibiotics such as cephalosporin and penicillin can be used for treatment. If you suffer from dermatomyositis complicated by interstitial pneumonia, it is recommended to seek medical treatment in time, and the relevant drugs should be used under the guidance of a doctor.