Too much coffee causes hallucinations ?

coffee1 in the morning
breakfast: rice + ULAM + coffee [ulam means a processeed meat,fish,veggies or anything that you can eat with rice]sometimes 2 to 3 in the eveningdinner: rice + ULAM + coffeeif i go out i'll go to 7/11 to buy a hot coffeeor if im doing something, then another one

Ulam is viand in english Zinetics

Whats the difference in the content of a cup of coffee and a cup of tea?I dont drink coffee, black, i always put at least sugar, and maybe cream if its available. maybe if you drink it black, it gives hallucinations and sugar/cream make it least potent for hallucination effect.If tea is the case, i drink it like water and it has no effect except for good digestion.

I only drink my coffee black and got no hallucinations so far.
(And I mean 'black' in a way you could almost use it as jelly.)I only noticed it can make you dizzy, if you drink too much.