
There is hardly a person in the world, who has never heard anything about Viagra. No doubt, everyone has at least heard this word, and the majority definitely knows what it means. Even kids know that it is a pill for men. At the same time only a few persons know that there exist at least two another brands of pills having the same action (for the treatment of Erectile Dysfunction): they are Levitra, produced by Bayer AG and GlaxoSmithKline PLC, and Cialis from Eli Lilly & Co. These products have already been tested, and experts confirm that they have a great future and will surely become serious Viagra competitors. Therefore it is worthy to get closely acquainted with them.
Indeed, recently a large number of men, having Erectile Dysfunction, took part in the Levitra and Cialis studies. The experiments were quite successful, and now the pills are already on sale in Europe and even in the USA (mostly with the help of the internet).
So all three drugs for male impotence work the same way: they block the enzyme PDE-5, resulting in the erection. Nevertheless, they have slight chemical differences, which means, that persons disappointed with Viagra can more effectively use either Levitra or Cialis.

A very important thing about Levitra is that this drug requires a smaller dose, but at the same time it starts working faster than Viagra.
Another question which is very important: how long do the pills remain effective? It is known that Viagra works for about 4 or 5 hours, but it can also be effective up to 12 hours taking into account individual peculiarities of every person. Levitras action lasts for about the same time, but Cialis have a great advantage over the other two drugs in this aspect: it remains effective for 24 hours and even up to 36 hours for different patients! This explains its nickname the weekend pill.
It is obvious that each pill has its own advantages; at the same time everyone knows that almost all the drugs have side effects as well. The medicine for Erectile Dysfunction is not an exception. The well-known Viagra, the same as new Levitra and Cialis usually cause headaches, upset stomach, flushing, altered vision and stuffy nose. It is worthy to note that Levitra seems to have fewer or at least less strong side effects. Nevertheless everything depends on the individual characteristics of health and organism of every patient. The nature as well as the degree of the side effects may vary among different persons, but according to the statistics, a very small number of men (about 1%) stopped using the above described drugs because of this reason.
In spite of all possible disadvantages, the production of two new brands of drugs for Erectile Dysfunction treatment will widen the choice and help all those men unsatisfied with Viagra solve their problem and live full life.
Nick
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