PRIOR CONCURRENT THERAPY: Biologic therapy: At least 4 weeks since prior immunotherapy No concurrent immunotherapy No concurrent colony stimulating factors or epoetin alfa Chemotherapy: At least 4 weeks since prior chemotherapy (6 weeks for mitomycin and nitrosoureas) At least 4 weeks since prior paclitaxel and recovered No prior high dose chemotherapy with stem cell rescue No other concurrent chemotherapy Endocrine therapy: At least 4 weeks since prior endocrine therapy (except chronic LHRH agonist replacement therapy administered for at least 3 months) No concurrent endocrine therapy except prophylactic steroids during first course of chemotherapy Radiotherapy: At least 4 weeks since prior radiotherapy No concurrent radiotherapy Surgery: At least 4 weeks since prior surgery No concurrent surgery Permanent indwelling central venous catheter required Other: At least 4 weeks since prior investigational agents (including FDA approved drugs for non-FDA approved indication) No concurrent medications that prolong QTc interval (e.g., terfenadine, astemizole, cisapride, quinidine, procainamide, disopyramide, sotalol, probucol, bepridil, tricyclic antidepressants, haloperidol, risperidone, indapamide, and dolasetron mesylate) No concurrent potent inducers of CYP3A (e.g., rifampin, phenobarbital, phenytoin, carbamazepine, troglitazone, and rifabutin) No concurrent benzodiazepines that are metabolized by CYP3A (e.g., triazolam, alprazolam, and midazolam) No concurrent HMG-CoA reductase inhibitors that are metabolized by CYP3A No other prophylactic medications during first course of chemotherapy except antihistamines and H2 antagonists (for paclitaxel) No more than 6 cups of coffee or the equivalent for other caffeinated beverages per day At least 24 hours since prior alcohol consumption No alcohol consumption while confined to the clinical research unit No more than 24 ounces of beer, 8 ounces of wine, or 3 ounces of whiskey or other equivalent hard liquor per day while not confined to the clinical research unit No concurrent illicit drugs No concurrent prochlorperazine