Topigen is the name of a pharmaceutical co. and a drug.
You may have seen this name on a migraine drug named Topomax.One key component of Topigen is Topiramate. Topiramate is used to make Topomax.
As for the company Topigen, they are a privately owned company founded in 2000 and made mostly respiratory biopharmaceuticals. Pharmaxis, another biotech corp.,now owns Topigen as of 1/2010.