Cialis has a high efficiency during problems with erectile dysfunction restoring normal and full life of a man and allowing to have sexual intercourse. The action of Cialis is based on natural body reactions and is seen only in state of excitement of man. Due to such strong action Cialis is one of the most asked-for drugs at the market and thousands of men take it every year. The action of Cialis lasts for a long period of time and therefore you can have several sexual intercourses at once. You can enjoy sex up to 36 hours and deny yourself nothing and have rest and fun.