The invention relates to agents for the prevention of organ damage, in particular of the kidneys and the inner ear, induced by the administration of aminoglycosides. The linear structures are constructed on an etchable crystalline layer having the first composition. The solid electrolyte layer is a thin film formed of a compound of the formula Li3 M04. It can reach a width of 36 to 40 inches. Moreover, because the user is not required to download a new function, the user can save time.