Antineoplastic Agents/administration & dosage; Dacarbazine/analogs & derivatives; Deoxycytidine/analogs & derivatives; Self Administration/methods; Administration, Oral; Altretamine/administration & dosage; Antineoplastic Agents/adverse effects; Benzamides; Bexarotene; Busulfan/administration & dosage; Capecitabine; Chlorambucil/administration & dosage; Cyclophosphamide/administration & dosage; Dacarbazine/administration & dosage; Deoxycytidine/administration & dosage; Drug Interactions; Drug Storage; Etoposide/administration & dosage; Fluorouracil/analogs & derivatives; Gefitinib; Humans; Hydroxyurea/administration & dosage; Imatinib Mesylate; Lomustine/administration & dosage; Melphalan/administration & dosage; Methotrexate/administration & dosage; Piperazines/administration & dosage; Procarbazine/administration & dosage; Pyrimidines/administration & dosage; Quinazolines/administration & dosage; Safety Management; Self Administration/adverse effects; Temozolomide; Tetrahydronaphthalenes/administration & dosage; Thalidomide/administration & dosage