Problem
Four out of five Americans use caffeine at some point in the day, and it's the most widely used stimulant in the world. There's nothing wrong with a morning cup of coffee or an afternoon jolt to keep you going every so often. But when you come to rely on caffeine day in and day out and you can't function without it, then you probably need to cut it down. Other common withdrawal symptoms included drowsiness, fatigue, nausea, and vomiting.

Cause
When caffeine enters the brain, it knocks out a brain chemical called adenosine while providing its own jolt of energy. Adenosine is a neurotransmitter- a chemical that sends messages from your brain to your body-that produces sedation, making you tired. Caffeine blocks adenosine, thus fighting off sedation. Your brain, however, can grow dependent on that java fix. When you deprive the brain of its caffeine jump start, it fights back by making you tired and sleepy, producing headaches and occasional nausea.

How Serious
Caffeine hasn't been shown to be physically harmful, even if you are addicted to it. The drug causes more behavioral problems than physical ailments. People addicted to caffeine often experience insomnia, the jitters, and an overall feeling of increased anxiety.
There is some evidence, however, that consuming more than four cups of coffee a day-or the equivalent amount of other caffeinated beverages- may be linked to higher risk of heart disease and high blood pressure.

Solutions
Relaxation is one of the keys to beating caffeine dependency, and listening to the music for 20-30 mins each day can help you relax.--- Steven Halpern, Ph.D., composer, researcher and author of Sound Health; The Music and Sounds That Makes Us Whole.