Covis Pharma to Acquire U.S. Rights from Sanofi for Nilandron®, Plaquenil®, Rilutek®, Uroxatral®, and Kayexalate® Covis, 4 Apr 2013 Accessed on 29 Aug 2014 from http://www.covispharma.ch/#!past-press-releases/c3cf. CommentRecommendBookmarkWatch