{Reference Type}: Case Reports {Title}: Bronchial Foreign Body Aspiration Due to Polycarbophil Calcium. {Author}: Tsuchiya T;Sano A;Kaneko M;Mizutani S;Fukuda T; {Journal}: Intern Med {Volume}: 60 {Issue}: 20 {Year}: Oct 2021 15 {Factor}: 1.282 {DOI}: 10.2169/internalmedicine.7030-21 {Abstract}: Polycarbophil calcium (Polyful®; Mylan, Tokyo, Japan) is a stool stabilizer that absorbs liquid and swells to form a soft, bulky mass. A 75-year-old woman experienced sore throat and difficulty breathing immediately after taking the drug. Chest computed tomography showed a foreign body in the right intermediate bronchus. Bronchoscopy showed a white mass blocking the right intermediate bronchus. Since the mass was very fragile, we performed suctioning while breaking up the mass with a suction tube. The mass consisted of polycarbophil calcium. Since aspirated polycarbophil calcium swells and can obstruct bronchi, complete removal is crucial.