Personally from weed I've never found myself truly out of control. Sure I feel paranoid plenty of times, and sometimes thats good to avoid getting burnt up, but I always have the sense to tell myself "hey you just smoked weed, your being paranoid, calm the fuck down"
One of the reasons why I fucking hate when people go crazy and can't control themselves "Ahhhhhh! I'm dying, HOSPITAL NOW!!"
I really think anyone can avoid letting paranoia take control but lots of people are just weak willed and give in "oo shit its the weed, I cant control it. AH!! so scary" Just get a grip and, its YOUR own brain, take control.