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A shock wave to your privates can be more effective for erectile dysfunction than Viagra or Cialis, a study by Rambam Medical Center in Haifa has found.

Low-energy shock waves can actually reverse the problem, unlike drugs, which can also require extended therapy, claim the scientists.

Men, worry not: These are very, very low-energy shocks, each delivering roughly 100 bar of pressure.

"We can really reverse erectile problems with this," researcher Yoram Vardi, head of the neuro-urology department at Rambam Medical Center in Haifa, told the LiveScience Web site.

Taking Viagra or Cialis can help men, but only as long as they take the pills. Rambam's shock-wavetherapy helps patients function without need for medication, Vardi told the site.

Their theory began with the knowledge that low-intensity shocks can stimulate the development of new blood vessels. It was not perhaps that far a reach to figure out that such shock waves could help men grow new blood vessels in their malfunctioning organs.

In four-fifths of cases, erectile dysfunction stems from cardiovascular problems.

It is clear that the potential market is vast, despite potential squeamishness for having electricity applied to one's gonads.

The shock is delivered by a device that comfortingly perhaps looks like a computer mouse. The scientists report that even though the trial consisted of applying about 300 shocks over three minutes to the penis, the men didn't complain of side effects or pain. It helped 15 of the 20 testees, Vardi said.

Certainly, the drug therapies available to treat erectile dysfunction have side effects. Men can develop a dependency on Viagra for instance, not to mention vision abnormalities, chest pain, nausea and more. Men are cautioned by the manufacturer itself, Pfizer, not to take the pill if they take nitrates, lest their blood pressure suddenly drop to hazardous levels.

Pfizer also warns men that if their resultant erection lasts more than four hours, they should seek medical help. Cialis has been associated with side effects that include facial flushing, muscle pain, and backache.