[mvpel]

Coffee is also very addictive, influences mental process and is very pleasurable.

I had muscle tremors, momentary losses of awareness, and heart palpatations on four lattes per day from my company's free espresso machine. Needless to say I switched to decaf.

[A. Pole]

I had muscle tremors, momentary losses of awareness, and heart palpatations on four lattes per day from my company's free espresso machine.

You were greedy and so you overdosed :). One or two lattes a day should be enough.