Abstract
Chronic hepatitis B is a major cause of liver disease in China. One of the treatments currently recommended is interferon (IFN). Although uncommon, there have been some case reviews on patients with hepatitis C with pulmonary adverse effects following treatment with IFN. Our case report is of a patient who acquired organizing pneumonia after he was treated for hepatitis B with pegylated IFN alfa-2b. We aim to raise awareness of the pulmonary toxicity of interferon, especially as it is increasingly used to treat patients with chronic hepatitis B.