The first patent for vardenafil currently expires in 2018. This is the earliest possible date that a generic version of vardenafil could become available. However, there are other circumstances that could come up to extend the exclusivity period of vardenafil beyond 2018. These circumstances could include such things as other patents for specific vardenafil uses or lawsuits. Once vardenafil goes off patent, there may be several companies that manufacture a generic vardenafil drug.