I mean, cigarette usage in the US is down massively since the US banned cigarette advertising to kids and actually started enforcing the ban on cigarette sales to kids.

Meanwhile, after cigarette companies spent some time thinking about how to solve the problem of falling sales, "vape" (which did not have the same regulations) sales surged first in kids, who have continued to use those products into adulthood (after they became addicted).

So, I would say "yes" regulating cigarettes not only worked, but was a massive public health success.