Researchers from Queensland University of Technology, Brisbane, and SRI International in California have found that anti-smoking drugs may actually be useful in combating sugar cravings.
The study conducted on rats found that Champix (Varenicline) which is used to help people stop smoking could also help combat cravings for sugary food and drinks.
The drug works because it targets the “reward pathways” of the brain, areas responding to stimuli. These can range from illegal drugs to gambling, to sugary foods. Source: http://www.nhs.uk/news/2016/04April/Pages/Anti-smoking-drug-may-also-help-combat-sugar-cravings.aspx