The end of October 2012 is the official expiration date for all the FDA-approved coral snake antivenin in the United States. So If you get bit next month, you can just die. Wyeth shut down the factory that made coral snake antivenin in 2003 because they just did not make enough money. Before shutting down, they made a five year supply. The FDA has extended the expiration date twice, but the end of this month is the end for good.