Robert downey jr apparently recovered. What will be the same thing will happen to Charlie Shen?

What do you mean "apparently"? Of course he recovered. And the same thing will probably not happen to Charlie Sheen because Robert Downey jr was popular and well known before and throughout his drug issues so when he finally did recover, many people were excited about it because they actually knew him and liked him. Charlie Sheen is well known but he isn't a movie star, pretty much only television. And he's all over the news. RDJ at least tried to hide his issues.