Lichensed® is a complete range of arctic lichen-based medical devices formulated for the treatment of flu symptoms in adults and children, especially wet and dry coughs, sore throat, and stuffy nose. The mechanism of action of the active ingredients of Lichensed develops in several phases: creation of a barrier effect for adhesion to the mucous membranes, which reduces contact with external agents; hydration of irritated mucous membranes; modulation of cough and thinning of mucus to promote its expulsion.