The invention relates to an oral dosage form, which is safeguarded against abuse and which has a controlled opioid release for a once daily administering. The invention is characterized in that the oral dosage form comprises at least one opioid with an abuse potential (A), at least one synthetic and/or natural polymer (C), optionally comprises retarding matrix materials, physiologically compatible adjuvants (B), optionally comprises a wax (D), and optionally comprises at least one retarding coating. Constituents (C) or (D) each have a breaking resistance of at least 500 N, preferably at least 750 N.
