It is difficult sometimes even if he wants to and he tries, so if he doesn't want to and it is a relative who tries to force him he has a bad prognosis.

In the case of someone who is just 18 years old, the legal age to gamble as mentioned in the thread, I think the best thing to do is to try to normalise it by informing them of the potential risks. If it's your child, it's better to go to the casino with them one day, and spend some time gambling in a controlled way but also explain to them how many people you've met who have had serious problems with gambling.

I think this is better because at the end of the day, being of age, he is going to do what he wants and if you try to convince him not to do it out of fear, what will happen is that he will do it on the sly.