Researchers at Brazil's Federal University of Minas Gerais have developed a vaccine called Calixcoca to fight addiction to cocaine and crack. The vaccine prompts the body to produce anti-cocaine antibodies that bind to the drug, preventing it from reaching the brain's reward center and reducing the risk of overdosing. Preliminary tests on animals were successful, and human trials are planned pending regulatory approval. The vaccine could also be passed through a mother's milk to protect nursing babies. However, it is not a panacea and would be most beneficial for recovering addicts who want to avoid relapse.

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