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Lilly ICOS LLC announced back in 2005 that the sales of Cialis had finally surpassed that of the once untouchable Viagra. Cialis is the ONLY treatment for erectile dysfunction that has been proven to work for up to 36 hours. Not only did Cialis beat out the sales of Viagra, which is very significant, but it also accounted for just about half of the market share respectively. The success of Cialis is exciting for the brand especially because Cialis entered the market after Viagra was so well branded. The key benefit of Cialis is its ability to last for 36 hours which gives a man and his partner the ability to choose when they want to become intimate and engage in sex. Tht factor alone is likely the reason for Cialis' great success. take viagra with amlodipine viagra simple amino acid viagra city price of viagra 100
