Cialis and Generic Cialis is the only drug which is not only fast acting (works in 30 minutes) but is also know to be effective for as long as 36 hours, thus enabling you to choose the moment that is just right for you as well as your partner. You can take Generic Cialis or Cialis in the morning and be ready for the right moment during that day, evening or even during the next day. Millions of men have benefited from Generic Cialis or brand cialis as it works effectively in mild, moderate or severe erectile dysfunction.