Viagra average dosage of 6.5 tablets, and a generic form of Viagra, sildenafil citrate.
The study found that there was no difference in erectile function between men with dysfunction and those normal or improved sexual function.
The researchers are keen that their findings - published in Urology are not repeated other studies.
They
Viagra 120 Pills 50mg $145 - $1.21 Per pill said: "We hope that our report may discourage other physicians and healthcare providers from routinely prescribing this product to men with erectile dysfunction.
"These findings raise questions about the safety and effectiveness buy viagra over the counter london of non-prescription erectile dysfunction drug therapy in males with erectile dysfunction. If a male does not receive appropriate therapy, he may experience adverse consequences such as impaired erectile function.
"Furthermore, there is concern that some individuals with ED may continue using an erectile dysfunction drug therapy when a non-prescription version is available."
The researchers did not know how many men in the study were already taking sildenafil citrate and whether there was a link between the use of two, or whether each had different effects.
This is because the study only monitored efficacy of the drug over a two-month period, before it and the other study drug were discontinued.
The team have also said that they do not know why the effect of drug might have diminished.
However, they said any potential adverse side effects are thought to be much more rare in men who do not have the problem of erectile dysfunction.
They ad
