contain other excipients chosen from antisticking agents such as microcrystalline cellulose colloidal silica or talc sweeteners flavourings colouring agents preservatives acidity regulating systems or mixtures thereof in the process for preparing edible self supporting films by extrusion a further aspect of the present invention the extrusion step ii is preferably conducted at a temperature between 60 and 120 u00b0 c in a single screw extruder in the second preparation process a further aspect of the present invention the polar solvent used in step i is preferably chosen from water water miscible solvents or relative mixtures in accordance with a particularly preferred embodiment the solvent consists of water or a mixture of water and ethanol the temperature of said step when a mixture of the aforesaid solvents are used is preferably between 60 and 105 u00b0 c the self supporting films of the present invention can be prepared using other methods such as by compacting the filmogenic formulation by the ultrasound technique some examples of formulations for the self supporting films of the present invention some processes for preparing said self supporting films as well as in vitro and in vivo disintegration tests conducted on films obtained with some of the illustrated formulations are given by way of non limiting examples the.