I found the same thing with aeropress. I can drink coffee all day, and have the occasional Americano no problem, but twice had a shot from an aeropress over ice and it gave me awful anxiety attacks both times.
Interestingly, cold brew makes me a bit anxious but doesn't really satisfy the caffeine craving the way a traditional cup of coffee does.
Interestingly, cold brew makes me a bit anxious but doesn't really satisfy the caffeine craving the way a traditional cup of coffee does.
YMMV I guess