So you have decided that you are going to buy a PDE-5 inhibitor to treat your erectile dysfunction problem, but you are not sure which one would be right for you. The three that you have to choose from are Viagra (sildenafil, Pfizer), Cialis (tadalafil, Lilly/ICOS) and Levitra (vardinafil, Bayer). These three drugs are the only drugs approved by the FDA to treat erectile dysfunction. All three work in the same way to preserve high levels of the substance cGMP (cyclic guanosine monophosphate) that is produced when a man is sexually aroused. As long as there are high levels of cGMP an ample amount of blood flows to the penis and an erection can be sustained. PDE-5 (phosphodiesterase-5) is the enzyme that is responsible for breaking down cGMP, so the idea is to inhibit the introduction of this enzyme when an erection is desired. This can be accomplished with all three of the aforementioned products. However, there are some differences that exist between them that should be considered before you make your purchase.
There has never been a head-to-head clinical comparison of these three drugs, and this is due mainly to the fact that Cialis and Levitra are still relative newcomers to the world of PDE-5 inhibitors. Viagra on the other hand has been on the market for many years, and there have been over 30 million men treated with this drug and thousands of peer-reviewed articles written. Although there has never been an officially recognized comparison with these three drugs together, all three have been studied separately, and the results of these studies have yielded almost identical findings.
First, let’s talk about the similarities in these three drugs. The efficacy is approximately 70% with all three. Most men have successful results. Most importantly, they all appear to be safe as long as they are taken while following the proper instructions and guidelines. There are certain similar precautions that should be taken before using any of these drugs.
1. Tell your Doctor:
