PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: At least 12 weeks Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.5 mg/dL AST and ALT no greater than 2.5 times upper limit of normal (ULN) (no greater than 5 times ULN if liver metastases) Renal: Creatinine no greater than 1.5 times ULN OR Creatinine clearance at least 60 mL/min Cardiovascular: No prior hemorrhagic or thrombotic cerebrovascular events including transient ischemic attacks No clinically significant or unstable cardiac disease No myocardial infarction within past 6 months No serious cardiac arrhythmia or conduction abnormality Pulmonary: No chronic obstructive pulmonary disease requiring hospitalization within past year Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective barrier contraception Female patients must use barrier contraception plus a second form of effective contraception for at least 3 months prior to and during study No other serious concurrent systemic disorders that would preclude study No uncontrolled diabetes mellitus, thyroid disease, or seizure disorder No active neurologic or psychiatric disease No clinically apparent uncontrolled infection (e.g., HIV, hepatitis B or C) No known sensitivity to imidazole containing drugs (e.g., clotrimazole, oxiconazole, sulconazole, econazole, etoconazole, metronidazole, or ketoconazole) No clinically significant gastrointestinal abnormalities requiring intravenous alimentation No malabsorption syndrome or active peptic ulcer No other lab abnormalities (i.e., electrolytes, uric acid, calcium, phosphorous, or glucose) that would preclude study No other malignancy in past 5 years except nonmelanomatous skin cancer or carcinoma in situ of the breast or cervix