RESUMO
We present a case of acute respiratory distress syndrome (ARDS) caused by allergic reactions to a herbal drug Saiko-karyuukotu-boreitou. A 57-year-old woman was admitted with a chief complaint of dry cough and dyspnea. She had been treated with Saiko-karyuukotsu-boreitou for postoperative pain and insomnia. Chest radiographs on admission showed diffuse infiltration shadows in both lungs. Chest CT scan showed diffuse ground glass opacities, consolidation and air bronchogram. Drug stimulation test was positive for Saiko-karyuukotu-boreitou. Based on the above findings, we diagnosed this case as Saiko-karyuukotu-boreitou-induced pneumonia. The patient recovered after discontinuation of Saiko-karyuukotu-boreitou. This is the fourth reported case of pneumonia induced by Saiko-karyuukotu-boreitou. We recommend careful observation when this medicine is prescribed.