Our sienna biotec api (active pharmaceutical ingredients) program began in 2009 with a simple objective - facilitating the manufacture of complex api's, products for which complete vertical integration would help the business. we currently make apis at 2 plants, including locations in taiwan. technical capability and dedicated sites to make complex api such as pregabalin, gabapentin, ondansetron hcl and lacosamide are an important feature of our api business.