There are drug treatment clinics in my country and they can provide therapeutic assistance to a person suffering from gambling addiction.
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.