As of July 2015, there is no injection available to help quit smoking. However, nicotine replacement therapy, behavioral therapy and certain drugs may help individuals trying to quit. An estimated 4 to 7 percent of individuals who smoke are able to quit the habit without outside help, notes WebMD.
Scientists are still in the testing stages of an anti-smoking vaccine, which may one day be able to help smokers quit the habit, notes CBS News. Anyone wishing to quit the habit is encouraged to work with a behavioral therapist as a way of quitting. The use of nicotine replacement therapy has been known to give positive results in some people. There are also cases in which a combination of drugs and behavioral therapy may work.