More and more, vaccine strategists are targeting drugs of abuse, like cocaine, heroin and nicotine. The science behind the vaccines is to generate antibodies that bind with the drug of abuse in the bloodstream and prevent it from reaching the brain to begin psychoactivity. Many of these vaccines are already in pre-clinical testing, while others are still being dreamed up. Scientists may be touting this as a major advance for public health and safety, but these vaccines may not fix all the problems and appear to have several drawbacks that warrant concern.
Read more here: Drugs of Abuse Targeted for Future Vaccines