At least 20% of men between the ages of 50 and 59 have erectile difficulties, the number increasing sharply with age. Some men see the solution to this troubling problem in the miraculous drug Syldenafil (Viagra). Unfortunately, not all men with erectile dysfunction respond to Viagra in the same positive way, one of the many possible reasons for it being even a minute change in the GNB3 gene. Rs5443 addressed this change. If you are a man you are surely curious to know whether the drug will have the same positive effect on you as well.
More information about genetic testing for medications.