Aren't they more like antidepressants or something of the sort? I'd honestly think that taking a walk, having some fresh air or having a vacation of sorts is a lot better than drugs. Idk, it just makes it feel more like, the one under medication is in need of a LOT of help instead of having that free mindset of calmness you get when having a breather. Like instead of letting go of what strangles you, it instead just lets you go for a moment before strangling back with stronger momentum/force.
I ain't a psychology doctor but this kind of problem are need to be treated well because the mere fact that the involve with gambling addiction if minor or even if not should need a cure.
And yeah giving him/her a new environment where he/she could live another way of lifestyle is better for him/her to forget the addiction hw/she had undergo in his/her life.
But of course before he/she bring in another environment we'll just need to make sure that he/she had undergo medication if needed or been in pschology doctor to treat his/her addiction.