The effects of Caffeine!

The main effect of caffeine is that it stimulates the central nervous system.With small amounts:
you feel more awake and alert,
your heart beats faster,
you can stay awake longer (if taken before you try to go to sleep),
you make more urine,
your hands shake slightly,
you have a smaller appetite.
With larger amounts, you may:become anxious and restless,have difficulty concentrating,get headaches,have difficulty getting to sleep,become confused.