Post-traumatic stress disorder can trigger erectile dysfunction and more and more war veterans are suffering from it
And it's mental stress that's causing more and more war veterans to experience sexual difficulties once they return from life on the front line.
The US Department of Veterans Affairs (VA) is reportedly treating a growing number of soldiers for post-traumatic stress disorder and is also dispensing more drugs like Viagra and Cialis.
These drugs are designed to help men overcome impotence, and the government body apparently spent $71.7 million on them in the 12 months to the end of September 2012.
This is almost triple the amount spent in 2006 on the same treatments.
Jason Hansman from the non-profit group Iraq and Afghanistan Veterans of America said the increase reflects the number of troops returning from war with mental health problems.
"This is not something that a lot of veterans would readily talk about," he remarked.
"It's a very good sign that the VA is paying out and not trying to avoid the issue in any way. Sexual health is part of the holistic picture of health for veterans."
Of course drugs like Viagra and Cialis are not the only treatments available to men suffering with impotence, as there are several other options.
For example, natural alternatives like Ultimate V capsules are available without prescription and contain traditional remedies to promote performance and erection strength.
There are also patches, oils and creams, as well as penis rings and pumps, which can be used in conjunction with erectile dysfunction medication.