16th World Congress of Anaesthesiologists

28 August - 2 September 2016
Hong Kong Convention and Exhibition Centre

Viagra (Sildenafil) VS Cialis (Tadalafil

Traditionally, around any new medicine, designed for a wide range of people, there is a lot of speculation and prejudice. Not escaped this fate and such drugs as Viagra and Cialis. These are new drugs in the pharmaceutical market, designed to help men who suffer from disorders of potency return to normal sexual life.

As with any drug, Canada medications Viagra and Cialis provide not only desired effect, which is expressed in increasing the length and rigidity of erections, but also some side effects. One of the side effects of Viagra, found at the stage of clinical trials was the change in the perception of blue and green colors, which appear, when Viagra has been taken at the beginning, and disappear in a few hours after taking this pill.

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After further investigation, Viagra manufactures have found that changes in color vision due to the fact that the active ingredient of Viagra - sildenafil - temporarily blocks the enzyme phosphodiesterase, not only in the vessels of the penis, but also in blood vessels of the retina. However, some people had doubts: whether these temporary blood supply changes are not harmful for vision in future?

Recently, scientists of pharmaceutical company Eli Lilly lab in Indianapolis decided to see how actually affect drugs Viagra and Cialis on human vision. For the study there have been collected three groups of volunteers. Participants in the first group received daily Canadian Cialis 5mg, participants of the second – Canadian Viagra 50mg, and the participants of the third group received a placebo.

Each of the study participants were examined daily ophthalmology, and for monitoring the status of use of such modern methods of diagnosis, as electroretinography. Surveys conducted before drug intake, during treatment and even six months after stopping treatment, showed that almost 80% of study participants throughout the study period had no changes in the organs of vision.

Of the remaining 20% the nine people dropped out of the number of participants for various non-medical reasons, and one other member of the experiment, which was included in the placebo group, has gotten disease of ophthalmic nature. Thus, it was proved that neither Viagra nor Cialis have adverse action on eyes.

For Levitra Canada pills - the third popular drug used to treat disorders of erectile function, there is not necessary in such studies, since it is known that it had no effect on the enzyme phosphodiesterase, which is contained in the retina and is somewhat different in its chemical structure of phosphodiesterase, produced in the vessels of the penis.

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