 Fewer than 200,000 crotaline envenomations occur annually in the US.Crotaline venoms contain a broad variety of toxins, venom variability and injection quantity among individual snakes and across species result in broadly variable patient presentations. Clinical consequences of crotaline envenomation include local and systemic effects, both of which may progress for hours to days.The best studied systemic consequence is coagulopathy, which may in its complexity mimic disseminated intravascular coagulation. Platelet and clotting disorders respond rapidly to administration of polyvalent antivenom. 