Rats that were exposed to a marijuana-related chemical while in the womb show more memory lapses and hyperactivity than unexposed rats do, a study finds. Marijuana-exposure studies in people have been clouded by factors such as a mother’s tendency to also smoke tobacco cigarettes or pursue other risky behaviors during pregnancy.
Vincenzo Cuomo of the University La Sapienza in Rome and his colleagues injected several pregnant rats with a drug called WIN55,212-2.
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