This will prevent a caffeine induced low blood sugar reaction that can cause shaking and the jitters. This will help to normalize the blood sugar level and lessen the severity of the reaction. But, like any other stimulant, keep it to a reasonable level. This is equal to about 2 or three cups of coffee. You should be aware of your caffeine intake for other health reasons.
Many people report poor, restless and unrefreshing sleep when using caffeinated products.
As it takes caffeine several hours to leave your bloodstream, avoid caffeine for a few hours before bedtime. If you have any questions about your own particular situation and the use of caffeine, you may want to speak with a health care professional.