title: Tetracycline "failure" in acne.
mesh_terms: D000152:Acne Vulgaris / Q000188:drug therapy*; D004334:Drug Administration Schedule; D006801:Humans; D008722:Methods; D013752:Tetracycline / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D013752:Tetracycline