I wouldn't ever have coffee sorry, because when they performed a test at hospital for coffee bean, it blistered on my arm. Quite a severe allergy.

Tachycardia is a symptom of a food allergy and anaphylactic shock. I thought they were panic attacks. But your body is panicking trying to tell you something. That’s terrible about the blisters! I get warm rashes wherever they pop up from environmental allergies. I always check to see when the mold, ragweed, dander, ect is high especially if I’m having symptoms.

I had a allergy that included coffee but is was for sallisilates that is present in caffeine

Sometimes if you change to a different coffee filter helps keep the reaction milder, white ones are treated with something. . I drink coffee from Italy with no reaction and Starbucks espresso whole beans not any other kind. The whole beans are different from the ground coffee, also treated with something. .

For my son,sometimes its hives. For me, it looks like the yellow brick road only in bright red.