Drug-safety officials have approved the first-ever treatment for scorpion stings that can prove fatal if left untreated.
The Food and Drug Administration says it will permit the use of Anascorp to treat stings by Centruroides scorpions, which live mostly in Arizona.
Stings by the scorpion can cause difficulty breathing, blurred vision and muscle twitching. Untreated cases can be fatal.
The FDA says that Anascorp is effective when injected into patients who had run-ins with Centruroides. It says that children and infants are the most likely to experience severe stings.
The approval follows a controlled trial that included 15 children with symptoms associated with scorpion stings. All of the subjects that received the drug improved within four hours. Symptoms persisted for all but one in a group that didn't receive Anascorp.