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The first patent for Cialis expires in 2016. This is the earliest date that a generic form of Cialis could become available. However, other circumstances could extend the exclusivity period beyond 2016.This could include such things as other patents for specific Cialis uses or lawsuits.ialis Â® (tadalafil) is a prescription medicine that is licensed for treating erectile dysfunction (ED). It is also approved for treating enlarged prostate symptoms. It is manufactured by Eli Lilly and is currently protected by a patent that prevents any generic Cialis from being manufactured.
On November 21, 2003 the FDA approved tadalafil (as Cialis) for sale in the United States as the third ED prescription drug pill (after sildenafil citrate (Viagra) and vardenafil (Levitra)). Like sildenafil and vardenafil, tadalafil is recommended as an 'as needed' medication. Cialis is also offered as a once-daily medication.