The info is from my own experience. I have posted my story many times. After 7 years of serious episodes when young, I read in a new column someone writing in with symptoms the same as mine and the DOCTOR replied that some people are extremely sensitive to caffeine and that it CAUSES not just worsens the episodes I was having.

I ended up decreasing my coffee to 1/2 cup and discovered it affected me as much as 4 cups. I ended up quitting and rarely had even a minor episode. Also, I had begun being a secretary at this time, and typed engineering specifications back when there was not even electric typewriters. If you made an error, had to white out or start the page over. I made errors when drinking even a tiny bit of coffee, b ut typed lickety split without it.

Now at age 76, I had found haagen daz COFFEE ice cream and was eating it, and within a short time, started to have heart rhythm issues. I do not live in US, so hadn't seen this ice cream in years.