The United States Food and Drug Administration (FDA) has given approval to a new dose of Cialis that can be taken daily.  This will hopefully mean that men who suffer from impotence will in future be able to take one 5mg dose of Cialis per day and be in an ever-ready situation, rather than having to anticipate when they would need the drug, even allowing for the generous 36 hour window that manufacturer Lilly claims is possible.  Lilly claim that Cialis is now the brand leader in 20 countries, ahead of Viagra and Levitra.  The 5mg Cialis dose is so far not available in the UK and there is currently no news of when this may happen.