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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.
The first patents for Sustiva expired in August 2012 and November 2013. However, generic versions are not yet available. This strongly suggests that other patents or exclusivity rights are still providing significant protection against generic competition. The next patent set to expire will do so in September 2014.