Clinical trials in men with complicated medical conditions
To get FDA approval to launch Levitra, the manufacturer ran four major trials. The average age of the 2,500 men participating was under 60. Half were otherwise “healthy” but there were two special groups: one was undergoing surgery for the removal of growths in the prostate; the other had diabetes. In all three groups, Levitra consistently produced erections that measured high on the International Scale. This involves each participant rating how easy it is to achieve penetration, and then how well the erection lasts until the successful completion of intercourse.
Levitra showed remarkable results
The other two drugs in competition for the erectile dysfunction market focussed on the general population. Levitra was unique in the choice to include men going through surgery and diagnosed with diabetes. It is fair to report that the other drugs have remedied this but their results are significantly less successful.
The problem in surgery is that, no matter how careful the surgeons, they are cutting into muscle and soft tissue. This always threatens sexual performance. Both in the initial and later trials, Levitra has consistently helped men to maintain sexual activity following surgery. Indeed, the arrival of Levitra has encouraged more men to have the surgery. It is the same with men whose nerve endings have been damaged by diabetes. They are able to maintain erections until consummation.
Does this mean that Levitra works in every case?
No drug can ever promise this. What all the trials show is that, in cases where the other drugs fail completely, Levitra helps about half the men to maintain a hard erection until intercourse is complete. This is not perfect but it is so significantly better than the other two drugs that there really is no choice in cases where accidental injury, surgery or disease has damaged sexual performance.