Possibility of quantitative definition of mediborol in oil solutions is shown by the method of Firordta and least-squares method for spectrophotometric analysis. The developed technique appreciably allows us to increase the measurement accuracy as compared with the direct spectrophotometric analysis. The error of the analysis does not exceed 1,36% for solution of mediborol in peachy oil and 0,83% in olive oil.

The ways of searching of herbal antiparasitic means for the alternative treatment of the prevailing diseases – lambliasis and opisthorchosis – have been examined.