The new mixed preparation immunofit has been created using on the prescriptions of Tibetan medicine, and the composition of essential oils isolated from this mixture has been studied. The composition of microelements in the initial mixture and in an aqueous alcohol extract has been determined. Experiments on CBA and F1 (CBA × C57B1/6) mice showed a pronounced immunomodulating activity of the new drug with respect to the model immunodepressed state induced by azathioprine.