title: Letter: Dosage forms in drug trials.
mesh_terms: D001205:Ascorbic Acid / Q000008:administration & dosage / Q000627:therapeutic use; D002214:Capsules; D002986:Clinical Trials as Topic; D003299:Cooperative Behavior; D004304:Dosage Forms; D004341:Drug Evaluation; D004359:Drug Therapy, Combination; D006801:Humans; D008709:Methenamine / Q000008:administration & dosage / Q000627:therapeutic use; D013420:Sulfamethoxazole / Q000008:administration & dosage / Q000627:therapeutic use; D013607:Tablets; D014295:Trimethoprim / Q000008:administration & dosage / Q000627:therapeutic use
chemical_list: D002214:Capsules; D004304:Dosage Forms; D013607:Tablets; D014295:Trimethoprim; D008709:Methenamine; D013420:Sulfamethoxazole; D001205:Ascorbic Acid