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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.
This has been discussed in the Manual of Patent Examining Procedure. A terminal disclaimer does not negate Patent Term Extension that has been granted under 35 U.S.C. 156. In a pharmaceutical patent dispute, Teva argued that Wyethâs patent on zaleplon drug products (Sonata) had expired because of a terminal disclaimer.