The invention relates to a method for producing a tamper-proof form of administration containing at least one synthetic or natural polymer (C) having a minimum breaking strength of 500 N in addition to one or several tamper-prone agents and optional physiologically acceptable adjuvants. A solvent for the polymer (C) is added to the formulation mixture at such amounts that the formulation mixture is at least evenly moistened, the at least moistened mass is optionally subdivided into partial masses, is dried, and is shaped into the form of administration.
