The researches on working out the "Dissolution" test for combining capsules of «Koask -30» have been conducted. According to the result of conducted experiments were selected the following conditions for carrying out the "Dissolution" test: determination of dissolution profile 0,1 M hydrochloric acid solution ( within 45 minutes it must be isolated not less than 75% of active substances), medium volume – 1000 ml, speed of rotation basket- 100r/min, temperature regimen -37±10C.