title: Letter: Altered plasma pharmacokinetics of methotrexate administered intrathecally.
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D001800:Blood Specimen Collection; D002648:Child; D006207:Half-Life; D006801:Humans; D007275:Injections, Intravenous; D007278:Injections, Spinal; D007945:Leukemia, Lymphoid / Q000097:blood / Q000188:drug therapy*; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage / Q000097:blood* / Q000627:therapeutic use; D013997:Time Factors
chemical_list: D008727:Methotrexate