The drug<unk>  is marketed under the trade name Zydena. It is within the PDE5 inhibitor class (which also includes avanafil, sildenafil, tadalafil, and vardenafil). Like other PDE5 inhibitors, it is used to treat erectile dysfunction.<unk>  was developed by Dong-A Pharmaceutical. It has fairly rapid onset of action (peak plasma concentration after 1 to 1.5 hours), and has long duration of action (plasma half-life of 11 to 13 hours).<unk> 's pharmacokinetics allows once-daily dosage (in addition to on-demand use). Typical doses are 100 and 200 mg.<unk>  is available in Korea, Russia, and the Philippines. It has not yet been approved for use in the United States by the U.S. Food and Drug Administration.
Udenafil
Avanafil
Vardenafil
Tadalafil
Ganirelix
Cobicistat
Atorvastatin
Orlistat