PURPOSE: A composition containing a medicinal herb extract is provided to suppress body weight increase without toxicity in vivo and to be used in a health functional food and a pharmaceutical product. CONSTITUTION: A pharmaceutical composition for preventing or treating obesity contains extracts of Corni Fructus, Dioscorea Rhizome, Citrus aurantium, and Platicodi Radix as active ingredients. The extracts are prepared using C1-C4 alcohol or a mixture solvent thereof. The extracts include 15-30 wt% of Corni Fructus, 15-30 wt% of Dioscorea Rhizome, 15-30 wt% of Citrus aurantium fruit, and 15-30 wt% of Platicodi Radix. A health functional food for preventing or treating obesity contains the extracts as active ingredients. [Reference numerals] (AA) Corni Fructus/Dioscorea Rhizome/Citrus aurantium； (BB) Corni Fructus/Dioscorea Rhizome/Citrus aurantium/Platicodi Radix본 발명은 산수유, 산약, 지각 및 길경의 추출물을 유효성분으로 포함하는 비만 예방 및 치료용 조성물에 관한 것이다. 상기 조성물은 생체 내 독성이 없으면서도, 체중 증가를 억제하는 효능을 가지므로, 비만 예방 또는 치료에 효과적인 의약품 및 건강기능식품으로 사용할 수 있다.
