Disclosed is a dissolvable film adapted to adhere to an oral mucosal tissue of a subject, wherein the film comprises at least three indigestible hydrophilic polymers constituting from 35% to 55% of the film dry weight and wherein the at least three polymers comprise xanthan gum and carboxymethyl cellulose (CMC) in a weight ratio of between 1:0.8-1.6, and at least one other cellulose based polymer. Optionally, the film may further include an active agent in an amount of 0.01% to 35% of the film dry weight. Disclosed also is a method for preparing the film and a method for treating or preventing oral conditions comprising implementing the film. Particularly, the film may be applied between dentures and the gums of the user.
