Of course but the underlying science applies to any destructive action. By seeing that others do it makes it seem more acceptable to those on the brink.
I'm at a loss as to why you are comparing suicide, which is more of an instantaneous thing, to addiction which is something that builds up over months and years. That's why guard rails on bridges and such protections reduce suicide rates - those "on the brink" will reconsider or get help given extra time. Addiction is not an "on the brink" issue.
No doubt copycat suicides exist, we saw it blatantly in our community a few years ago. That is a far cry from a young man reading about the horrors of addiction and thinking, hey, let me try that," and then getting hooked over the course of an extended period of time.