A reliable source has told me that Viagra is being tested for effectivenes in treating pulmonary edema, although the FDA hasn't given Pfizer the indication for this yet. Makes sense to me though. If it rushes blood to the male extremity, think what it would rush to the heart! Makes me also wonder if it could also prevent cerebral edema, and altitude sickness altogether. It may be worth testing in the field, although it would require wearing loose shorts (Sorry, I couldn't resist)!
Any doctors out there care to weigh in on this?