日本富山医科药科大学和汉药研究所难波恒雄教授的研究小组(1987年),证实原作为胃肠药的日本当药具有降血糖作用。近期在英国植物疗法学会志《Phytotherapy Research》发表了其研究结果。三年前,难波教授继续进行了具有降血糖作用的中草药的研究。动物实验,将日本当药的乙醇提取物成分给高血糖大鼠注射,可使血糖降低42％(一般降糖药为28％)。并且同样情况下,经 The research group of Japan’s Toyama Medical and Pharmaceutical University and the Institute of Chinese Medicine, Professor Namba Hoshio (1987), confirmed that Japanese medicine used as a gastro-intestinal agent has a hypoglycemic effect. The results of its research have recently been published in Phytotherapy Research, the British Phytotherapy Society. Three years ago, Professor Namba continued research on Chinese herbal medicines with hypoglycemic effects. In animal experiments, the injection of ethanol extract from Japanese medicine into hyperglycemic rats reduced blood glucose by 42% (28% for general hypoglycemic agents). And in the same situation,