The present invention relates to a synergistic pharmaceutical composition useful for the treatment of hyperlipidemia, said composition comprising extracts of plant Gentiana kurroo of concentration ranging between 2-5 wt. %, Murraya koenigii of concentration ranging between 8-15 wt %, Allium sativum of concentration ranging between 2-4 wt %, Zingiber officinalis of concentration ranging between 2-5 wt %, Amorphophallus campanulatus of concentration ranging between 1-10%, and pharmaceutically acceptable additive(s); a process for the preparation of the said synergistic pharmaceutical composition; and also, a use of the said composition for treating hyperlipidemia, atherosclerosis, and obesity.