CroFab

Crotalidae polyvalent immune fab, sold under the brandname CroFab, is a snake antivenin, indicated for minimal or moderate North American Crotalid (Rattlesnake, Copperhead and Cottonmouth/Water moccasin) snake envenomation. CroFab is composed of several monovalent Fragment antigen-binding proteins (Fab) derived from the blood of sheep immunized with one of four snake venom: Crotalus atrox (western diamondback rattlesnake), Crotalus adamanteus (Eastern diamondback rattlesnake), Crotalus scutul... [wikipedia]