Root of althaea medicinal contains the far of vegetable mucus (*5%%), consisting mainly of polysaccharidess, starch (*7%%), astringent substances, apple acid, cane-sugar of and other the Basic active curative component of root is consider a mucous substance that turns out at infusion of root in water. Infusion has an enveloping action, and at the use covers the inflamed mucous membranes and protects them from an irritation, to what application of althaea medicinal is related at sharp respiratory viral infections.