I am very sensitive to caffeine, and have got more sensitive with age. As a result I don't drink coffee, apart from decaff. Thankfully I never drink caffeinated soft drinks, and only eat chocolate in small doses. However, I do like my tea . Most of the time with tea I have no negative symptoms, even when the tea is quite strong (as I like it). But I always get very hyper, energetic and talkative. But occasionally I get the negative symptoms that I get with coffee, whenever the tea is too strong. I was with my support worker today when this happened. She also had strong tea and felt slightly sick afterwards, but nothing too bad. But I started off hyper, then grew jittery and nervous, with trembling, disorientation and slight dizzyness, not helped by being in a very hot room for an hour and the fact I was already tired after a busy week. My senses were heightened and the crowded room and flashing cameras added to my anxiety. I don't usually get anxious about flashing lights, but I think the caffeine must have made me a nervous wreck. The tea I had was EXTREMELY strong cafe tea, stronger than even I would normally have it. It took three hours until I felt fine again. Does anyone else experience this? I have read that the smaller you are, the less caffeine it takes to cause a reaction. I am very short in height and slender.