PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: At least 14 days since prior chemotherapy No concurrent chemotherapy Endocrine therapy: At least 2 months since prior initiation of hormonal therapy Hormones as appetite stimulant allowed if received for more than 2 weeks No concurrent oral contraceptives Concurrent steroids allowed if taken for at least 1 week prior to study Concurrent inhaled or oral corticosteroids allowed if taken for at least 1 week prior to study No concurrent initiation of a new hormonal manipulation Radiotherapy: At least 28 days since prior radiotherapy that includes the lung in the treatment field No concurrent radiotherapy that includes the lung in the treatment field Surgery: Not specified Other: No concurrent digitalis glycosides, lithium, coumarin anticoagulants, other xanthines, cimetidine, quinolone antibiotics (e.g, ciprofloxacin and norfloxacin), macrolide antibiotics (e.g., erythromycin), fluvoxamine, and calcium channel blockers Concurrent nebulized or inhaled cromolyn, nedocromil, beta2-agonists, ipratropium, opioids, benzodiazepines, oxygen, and diuretics allowed if dose is stable for more than 1 week prior to study No concurrent paracentesis (i.e., thoracentesis) No concurrent blood transfusion