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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.
Cialis can also be taken in lower daily doses of 2.5â5mg, to allow for continuous treatment of ED. The 2.5mg daily Cialis is still patent protected (possibly until 2020). Tadalafil: Generic Cialis When Pfizer lost its patent on Viagra in 2013, other manufacturers began making generic sildenafil, resulting in a dramatic reduction in price, and the same can reasonably be expected for Cialis. When developing a new drug for release to the market, drug companies choose a brand name for the medicine.