Researchers are testing a blood pressure drug on some European children to see if it improves the core symptoms of autism. The drug, bumetanide, has been tested in mice bred with a genetic risk for autism, and in rats exposed to a drug that can cause autism.

Testing is in its early phases, and some doctors urged caution. "So many things cure cancer in mice and rats, and so many things cure all kinds of things and then when we give them to humans they have adverse affects and don't fix the problems we thought they could fix," Dr. Gary Goldstein, president and CEO of the Kennedy Krieger Institute, told USA Today. "I wouldn't give it to my child, I can tell you that."