The present invention is related with .alpha.-aryl-4-(4,5-dihydro-3,5-dioxo-1,2,4-triazin-2(3H)-yl)benzeneaceton itriles which are effective in destructing or preventing the growth of Protozoa in subjects suffering from such Protozoa.
                            本发明涉及α-芳基-4-(4,5-二氢-3,5-二氧杂-
1,2,4-三嗪-2(3H)-基)
苯乙腈,其在破坏或预防患有此类原生动物的受试者中具有有效性。