[llamaz]

"Do you know what it’s like? What it’s like when you get the feeling that you’re about to die? And that you were ready to collapse at a moment’s notice?"

It sounds like the author had a bad experience with energy drinks. Everyone reacts differently to substances such as caffeine, or a combination of substances.

Some people are lactose intolerant, or gluten intolerant. The author is energy drink intolerant.