Mezzion Pharma Co.,Ltd. engages in the development, licensing, and commercialization of drugs for the treatment of vascular diseases. It is developing Udenafil, a PDE5 inhibitor to treat erectile dysfunction, benign prostatic hyperplasia, pulmonary arterial hypertension, overactive bladder, hepatic portal hypertension, and chronic obstructive pulmonary diseases. The company was formerly known as Dong-A Pharmtech Co., Ltd. and changed its name to Mezzion Pharma Co.,Ltd. in April 2013. Mezzion Pharma Co.,Ltd. was founded in 2002 and is based in Seoul, South Korea.