Viagra And Cialis Research Shows No Vision Problems
Written by Jamie Stowe | Wednesday, 15 April 2009 | There is 1 comment
The eyes of the participants were examined before, during and after the study
New research done with the erectile dysfunction drugs Viagra and Cialis conclude that they play no part in increasing the likelihood of vision problems which they had previously been linked with. There had been reports that both Viagra and Cialis in very rare cases caused vision to be slightly blurred or to have a blue hue. In fact the labeling of the impotence drugs Viagra and Cialis both mention this as a very rare side effect.
The research led by Dr William Cordell from Lilly Research Laboratories in America used electroretinography to look at the electrical response of light sensitive eye cells. The eyes of all the participants were examined before, during and after the study to see whether there were any changes in the retinas in the men who used the Viagra and Cialis drugs.
Almost 250 men were looked at, some of whom suffered from mild erectile dysfunction and who were between 30 and 65. All of the men had no existing eyesight problems whatsoever. The researchers gave 85 of the men Cialis, 77 of the men Viagra and 82 men were given a placebo pill every day for a six month period.
The research which was written up in the clinical journal Archives of Ophthalmology was paid for and designed by the drug company Eli Lilly, which manufactures Cialis and therefore may be considered by some people not to be completely independent, however they should take note of the fact that Cialis’s biggest rival Viagra also got a clean bill of health from this study.
Because there are blood vessels in the eye and impotence drugs have an effect on blood vessels it is possible that they could have an effect on vision however in the vast majority of the extremely rare cases the vision problems soon disappeared. The researchers did stress however that they did not look at men who had existing eye problems which could be made worse by Viagra and Cialis.
The third erectile dysfunction drug Levitra made by Bayer was not a part of this study.
