The invention relates to sheet-like dosage forms dissolving or disintegrating in an aqueous medium, for releasing at least one active substance in a body orifice or body cavity, comprising a polymer matrix in the form of a solidified foam containing spaces or cavities, as well as at least one pharmaceutical or cosmetic active substance, said dosage form being characterised in that the polymer of said matrix is a polyvinyl alcohol-polyethylene glycol graft copolymer. The invention also relates to methods for producing such dosage forms.
