Drug Information for Wyeth Antivenin (Micrurus fulvius) (Equine Origin) North American Coral Snake Antivenin (Wyeth Pharmaceuticals Company): WARNINGS

Patients sensitive to Antivenin or horse serum may develop anaphylaxis. Therefore, it is essential that prior to intravenous (IV) or intramuscular (IM) Antivenin administration a proper skin test be performed, interpreted, and therapy modified if indicated.

There have been isolated reports of cardiac arrest and death associated with use of Antivenin (Crotalidae) Polyvalent (equine origin).¹³ Although this experience has not been reported with Antivenin (coral snake), because of the similarity of these Antivenin products, this reaction cannot be ruled out for Antivenin (Micrurus fulvius) (equine origin).