Upsher-Smith Laboratories is a privately owned pharmaceutical company headquartered in Maple Grove, Minnesota. Founded in 1919 as a maker of digitalis drugs, Upsher-Smith has traditionally focused on the manufacture of generic and "branded generic" medications, most prominently Jantoven (generic Warfarin). Another product is AmLactin.The company acquired its wholly owned subsidiary, London-based Proximagen, in August 2012.