Patent ID: 7803430

Claim:
A process for producing a pharmaceutical preparation, comprising: coating a polymer solution of water soluble polymers, that contains one or more ingredients selected from the group consisting of pharmacological active ingredients, substances with refreshing effect, flavorings, odorizers and sweeteners, onto an inert substrate by knife or roller application or a spraying process and subsequently drying to produce an initial film; coating a second polymer solution of water soluble polymers, that contains one or more ingredients selected from the group consisting of pharmacological active ingredients, substances with refreshing effect, flavorings, odorizers and sweeteners, in a solvent or solvent mixture which does not dissolve the initial layers, onto one side of the initial film by knife or roller application or a spraying process and subsequently drying to produce a film composite; coating the film composite with a next layer or with further layers in an analogous way using solvents which do not dissolve the layer(s) previously produced, thereby producing a pharmaceutical preparation, wherein the first layer is based on a mixture of polyvinyl alcohol/polyvinyl acetate and the second layer is based on polyvinylpyrrolidone.