title: Letter: Effects of medication of plasma vitamin A concentrations.
mesh_terms: D006801:Humans; D008607:Intellectual Disability / Q000097:blood / Q000188:drug therapy; D007548:Isosorbide Dinitrate / Q000494:pharmacology* / Q000627:therapeutic use; D010634:Phenobarbital / Q000494:pharmacology* / Q000627:therapeutic use; D010672:Phenytoin / Q000494:pharmacology* / Q000627:therapeutic use; D013881:Thioridazine / Q000494:pharmacology* / Q000627:therapeutic use; D014801:Vitamin A / Q000097:blood*
chemical_list: D014801:Vitamin A; D010672:Phenytoin; D007548:Isosorbide Dinitrate; D013881:Thioridazine; D010634:Phenobarbital