Scorpion stings are nasty things in the Southwest — made worse because antivenom isn't profitable enough to be widely available. Mexico, however, sees an opening in the market:
Toxicologists refer to the American Southwest as the "Venom Belt" for its many venomous spiders, snakes and scorpions. In fact, doctors estimate there are about 250 severe scorpion stings a year in this country. Most of those stung are children in Arizona, but the U.S. ran out of its own supply of scorpion antivenom nearly a decade ago. Mexican doctors, however, have been treating stings from venomous creatures for years, and what they've learned may now save American lives.