The Pentagon's bill for medicine to treat the problem totalled 84 million dollars last year, a military spokesman confirmed Wednesday.
Half of the total was spent on the drug Viagra, according to data compiled by the Defence Health Agency within the Department of Defense.
Since 2011 the US military has spent 294 million dollars on medication to treat erectile dysfunction, about equal to the cost of four F-35 fighter jets, according to the Military Times.
Erection dysfunction can be triggered by events soldiers experience during deployment, the report said.
Studies show that the number of soldiers who suffer from erectile dysfunction in recent years has gone up.
About 90 per cent of the patients prescribed the drugs were veterans.
A report on the data was published online last week by the Washington Free Beacon, but with far lower figures.