In Kampo, respiratory symptoms are treated with prescriptions related not only to “lung”, but also other parenchymatous viscera. We report 2 patients whose stress-induced chronic cough was ameliorated by hachimijiogan. Case 1 was a 25-year-old female who was working under stressful circumstances at her company and reported an oppressive feeling in the chest. She was initially prescribed hangekobokuto because of a feeling that something was stuck in the pit of her stomach on abdominal examination, but her cough did not get better. As she also noted a dull feeling in her back ; she was switched to hachimigan, and her cough disappeared. Case 2 was 42-year-old female who suffered from depression, sore throat and an obstructive feeling in the throat ; she had been receiving infertility treatment for several years. Hangekobokuto and bakumondoto showed insufficient effect on her persistent cough. Her coughing stopped when she was prescribed hachimigan for back pain. Neither of these patients showed lack of resistance of the lower abdomen on abdominal examination.
Chronic ki (qi) stagnation under stressful conditions may cause ki deficiency, especially kidney deficiency. The symptom of stress-induced cough in our cases was considered to be due to kidney deficiency, and therefore hachimijiogan, but not hangekobokuto, was effective. The short duration of the complaints and relatively young age (20-40's) of the patients may account for the absence of the typical abdominal sign of kidney deficiency. Back stiffness and pain may also be important signs for cough due to kidney deficiency.