Objectives: Through this study, it would be confirmed that specific expression for efficacy of medicinal material has multiple meanings. And through the methodology to determine the multi meaning, it could be contributed to lighten ambiguous expressions for efficacy of medicinal material. Methods: The premise is that the efficacy and treatment target data are related to each other. Word cloud has been used analyzing the efficacy and treatment target data for medicinal materials. Then classic and modern documents were analyzed by the search. Results: Even though searching all related references as well as comparing the efficacy and treatment target data were done, some medicinal materials having ``Salchung[殺蟲]`` as an efficacy are not expected to treat the disease associated with the parasite. Through the analysis of classic and modern documents, it was found that ``Salchung[殺蟲]`` is not used only as a means of anthelmintic efficacy. But through the above analysis method some medicinal materials having ``Guchung[驅蟲]`` as an efficacy are expected to treat the disease associated with the parasite, and ``Guchung[驅蟲]`` seems to be almost used as a means of anthelmintic efficacy. Conclusions: If a certain expression for efficacy of medicinal material is used as a single meaning obviously, ambiguous expressions need to be clear. And if a certain expression for efficacy of medicinal material seems to have multiple meanings, the additional informations are to be supplemented for exact wording.