Interesting idea...
http://goo.gl/FxegIfIn a new study, published today in the journal Angewandte Chemie, the scientists report successful preclinical tests of a vaccine that prevents the synthetic opioid fentanyl—which some drug dealers now use as a mix-in or substitute for heroin—from reaching the brain.
"We want to stay one step ahead of these clandestine laboratories making illegal opioids for black market demand," said Kim Janda, the Ely R. Callaway Jr. Professor of Chemistry and member of the Skaggs Institute for Chemical Biology at TSRI. "The importance of this new vaccine is that it can block the toxic effects of this drug, a first in the field."