About four years ago, I used to drink like four or five cups of coffee a day. I could drink energy drinks, no issues whatsoever.

Now, even the smell of coffee or the slightest amount of caffeine makes me jittery, scared, on edge, my pupils become huge. It basically gives me an anxiety attack.

I avoid caffeine at all costs. As well as stimulants, I can't even take Sudafed because it gave me one of the worst anxiety/panic attacks of my life.

Does this happen with anyone else?

And if so, did you used to be able to tolerate caffeine?