While all addictive substances affect slightly different areas of the brain, the one thing they share in common is stimulation of the reward centers, the areas of the brain that release the pleasure hormones that make us feel good.
While Suboxone is fast proving successful -- one clinic boasts an 88% success rate after six months of treatment compared with just 50% for methadone -- not everyone has equal success.
For some addicts the effects are simply not strong enough to cut the craving, while for others, side effects including headache, withdrawal syndrome, pain, nausea, and sweating can make treatment difficult.
Still, experts say for most who try it, it offers the promise of treatment success with far fewer problems.