“Adhesion of xerogel dressings …), methylcellulose (MC) and glycerol compositions, remaining within the range of 625-650 g, after addition polyvinylpyrolidone (PVP) amounts to 450-1250 g. Dissolution … without PVP additive both in water and in an artificial gastric juice amounts to 3 h. Addition of PVP results in … rate.”