A team of American researchers is currently developing a new vaccine that can prevent heroin and its breakdown products from reaching the brain.

The vaccine is being developed by researchers at The Scripps Research Institute (TSRI) and is expected to be tested on humans after successful trials in rats.
“Heroin-addicted rats deprived of the drug will normally resume using it compulsively if they regain access, but our vaccine stops this from happening”, TSRI chairman Prof George Koob said.
Source-Medindia