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FDA approves Anascorp for Scorpion Stings

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2011-08-04 09:44

Yesterday the U.S. Food and Drug Administration approved Anascorp, the first specific treatment for a scorpion sting by Centruroides scorpions in the United States.

In the U.S., most venomous scorpions are found in Arizona. There are 30 species of scorpions found there, buy only one is regarded as life-threatening: the Bark Scorpion (Centruroides exilicauda). It has slender tail segments and pincers, reaching only an inch and a half at maturity.

Scorpions are relatively inactive during the daylight hours. The majority of stings reported occur at night during the warm summer months.

Scorpion stings can cause immediate local pain with minimal swelling. Numbness and tingling are frequently reported. The injured area may be very sensitive to touch, pressure, heat and cold.

Small children are at highest risk of severe reactions which are marked by shortness of breath, fluid in the lungs, breathing problems, excess saliva, blurred vision, slurred speech, trouble swallowing, abnormal eye movements, muscle twitching, trouble walking, and other uncoordinated muscle movements. Untreated cases can be fatal.

“This product provides a new treatment for children and adults and is designed specifically for scorpion stings,” said Karen Midthun, M.D., director of the FDA’s Center for Biologics Evaluation and Research. “Scorpion stings can be life-threatening, especially in infants and children.”

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Anascorp, Centruroides (Scorpion) Immune F(ab’)2 (Equine) Injection, is made from the plasma of horses immunized with scorpion venom. Anascorp may cause early or delayed allergic reactions in people sensitive to horse proteins. The manufacturing process for Anascorp includes steps to decrease the chance of allergic reactions and to reduce the risk of transmission of viruses that may be present in the plasma.

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