PATIENT CHARACTERISTICS: Age: 18 and over Performance Status: ECOG 0-1 Life Expectancy: Not specified Hematopoietic: Absolute neutrophil count at least 2,000/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin within normal limits Alkaline phosphatase no greater than 3.0 times upper limit of normal (ULN) AST no greater than 3.0 times ULN Renal: Creatinine no greater than 1.3 times ULN Other: Not pregnant or nursing Fertile patients must use effective contraception No significant infection or medical illness No significant nausea or vomiting At least 1200 calories per day of oral nutrition