The two most commonly used prescription treatments for stopping smoking are Champix and Zyban. Although both essentially help reduce the cravings associated with quitting smoking, they work in different ways.
Zyban affects the part of the brain that’s related to addiction. Champix instead blocks how nicotine interacts with the receptors in the brain. It also releases dopamine, but to a lesser extent than Zyban. So they function differently, but provide similar results, at least in the long term.
That’s not to say that they work the same for everyone. Finding the right treatment can vary from person to person, so there’s no one size fits all.