title: Failure of lysine treatment in recurrent herpes simplex labialis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D005260:Female; D006560:Herpes Labialis / Q000188:drug therapy*; D006801:Humans; D008239:Lysine / Q000008:administration & dosage / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D010919:Placebos; D012008:Recurrence; D012107:Research Design; D013607:Tablets
chemical_list: D010919:Placebos; D013607:Tablets; D008239:Lysine