RÉSUMÉ
It is essential to prolong the term as possible in the treatment of threatened premature delivery. We report a case of threatened abortion successfully treated with hochuekkito. The patient was 31 year-old pregnant woman with lower abdominal pain. She was diagnosed to be at the risk of premature delivery on 21 weeks and 5 days of gestation. Intravenous ritodrine hydrochloride was started and she had to stay in bed. Severe side effects of ritodrine hydrochloride such as palpitation, tachycardia, tremor, nausea, and loss of appetite were appeared and she was consulted to our department on 23 weeks and 1 day of gestation. Those symptoms were markedly improved after administration of hochuekkito extract. She delivered a male infant of 1230g birth weight on 28 weeks of gestation. Hochuekkito suppressed severe side effects, and enabled to continue the infusion of ritodrine hydrochloride, suggesting the usefulness of Kampo therapy in the treatment of threatened premature delivery.