Oncology Quick Quiz

 A 76-year-old man recently experienced disease progression on single-agent docetaxel plus prednisone for hormone-refractory prostate cancer. He is a nonsmoker with no personal or family history of cardiac disease. He complains of sharp pain in his lower back related to known bone metastases. He has lost 15 lbs during the last 3 weeks. He has no appetite, only taking a few small bites a few times per day. He also complains of dyspnea, noting that this has gotten worse as his overall energy level has dropped. He spends more than 75% of his day in bed. In the office, his resting oxygen saturation is 95%. With exertion it reduces to 93%. Which one of the following statements is true about the treatment of dyspnea?