Fentanyl Pectin Nasal Spray (FNPS) for Exercise-Induced Breakthrough Dyspnea

The goal of this clinical research study is to learn if fentanyl nasal spray can help to control shortness of breath in patients who have been treated or are being treated for cancer. Fentanyl is commonly used for treatment of cancer pain. It may help patients with their shortness of breath as well. In this study, fentanyl will be compared to a placebo. A placebo is not a drug. It looks like the study drug but is not designed to treat any disease or illness. It is designed to be compared with a study drug to learn if the study drug has any real effect.