Sun-In is one of the brand of Chattem. The Company was founded as the Chattanooga Medicine Company on February 21, 1879. It began operations in a small unpretentious 2-story brick building located on a muddy, unpaved road called Market Street in the heart of downtown Chattanooga. Since March 10, 2010 Chattem is part of the sanofi-aventis Group. is proud to carry the entire range of this fine brand.