PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: See Disease Characteristics Endocrine therapy: No concurrent systemic endocrine therapy that is known to have an effect on non-small cell lung cancer Radiotherapy: See Disease Characteristics Prior localized irradiation allowed Surgery: See Disease Characteristics Prior surgery allowed Other: No concurrent drugs with known significant cytochrome P450 3A4 inhibitory effects (e.g., ketoconazole, itraconazole, troleandomycin, erythromycin, diltiazem, verapamil)