Panera Bread killing folks

I had to stop taking 5 HR energy shots several years back because they got me to anxious/amped.
I drink 1 quick brew cup (6 oz setting) about 4 times a week...so I am pretty sure these would absolutely crush me. I go down by family in FL often and they drink several pots of coffee in the morning--and it's strong brew (not Cuban but prob not far off) roast stuff...I really don't know how they can do it.