ANI Pharmaceuticals Inc. has acquired the NDAs for purified corticotropin gel and corticotropin zinc hydroxide from Merck for $75 million and a percentage of future net sales. ANI estimates that the current annual U.S. market for the products it is acquiring is approximately one billion dollars as evidenced by sales of H.P. Acthar gel marketed by Mallinckrodt Pharmaceuticals. Corticotropin gel is a purified corticotropin (ACTH) in a sterile solution of gelatin for prolonged activity. Corticot...