How coffee causes exhaustion, fatigue and addiction, Pt 7

It’s this "more" that is a double-edged sword. The initial high from caffeine is followed by mild withdrawal symptoms, one of which is fatigue. A vicious cycle can result as you drink more coffee to prevent the inevitable letdown. The fatigue, an irritable or depressed mood, and reduced work performance associated with caffeine withdrawal can begin within hours of the last cup and can last up to a week or more. People’s tolerance to caffeine varies widely. Withdrawal symptoms are reported in some people even with small amounts of daily caffeine, such as one to two cups, while other people can tolerate higher doses with no problems.
Food & Mood By Elizabeth Somer MA RD, page 105

Caffeine, which has come to be many Americans’ "drug of choice," is highly addictive. A number of people suffer severe withdrawal symptoms—headache, fatigue, depression, muscle pains—when they abruptly stop their coffee or indeed their caffeinated tea intake. Caffeine also gives some people headaches and makes others quite anxious. Coffee in particular irritates the stomach and may stimulate the development of cysts in women’s breasts.
Manifesto For A New Medicine By James S Gordon MD, page 155

Caffeine is clearly addictive, completely unregulated, and its presence in our foods and beverages is often hidden! Almost daily I see a patient whose symptoms are made worse by the consumption of caffeine. The drug contributes to palpitations, panic attacks, hypoglycemia, gastritis, fatigue, insomnia, and PMS, to name a few. Some people are so sensitive to caffeine that they don’t realize a fruit drink with hidden caffeine can cause their symptoms.
Caffeine Blues By Stephen Cherniske MS, page 10

Many people are addicted to caffeine. While studies attempting to prove that caffeine is implicated in everything from heart disease to high blood pressure have never been conclusive, I believe that the damage excessive caffeine consumption does can’t be ignored. Caffeine wreaks havoc on your metabolism and creates a real stress that could precipitate symptoms including headaches, fatigue, irritability, inability to concentrate, depression, and nervousness.
Natural Prescriptions by Dr Robert M Giller, page 10

Telling whether you are addicted to caffeine is simple, says Dr. Griffiths. Just give up your caffeine sources—coffee, tea, soft drinks —for a couple of days and see if you feel tired, headachy, unmotivated, grumpy and depressed. Headaches and fatigue are the classic signs of caffeine deprivation.
Food Your Miracle Medicine by Jean Carper, page 277

A significant cause of general fatigue is caffeine withdrawal. Since millions of Americans have caffeine addictions, caffeine-related fatigue is a common problem. When a person accustomed to large quantities of caffeine suddenly limits his or her intake, the result will be fatigue, probably accompanied by a headache. Eliminating dependence upon coffee and other caffeinated products is crucial to maintaining health and avoiding debilitating bouts with fatigue.
Complete Encyclopedia Of Natural Healing by Gary Null PhD, page 104

Anyone with regular caffeine intake should truly consider withdrawing from their habit until they can reach a state of occasional use and enjoyment. For caffeine detoxification, it is important to support ourselves nutritionally while we eliminate or reduce our intake. If we are clearly addicted to caffeine products or if we become pregnant, we should quit totally. Breaking the habit by tapering down or going "cold turkey" will be better handled with a good diet and adrenal support.
Staying Healthy With Nutrition by Elson M Haas MD, page 942

If your body doesn’t get its caffeine quota, it can go through a week or two of withdrawal symptoms, including headaches, fatigue, intense cravings for caffeine, constipation, anxiety, and a dim bulb where you used to have bright ideas.
Alternative Cures by Bill Gottlieb, page 137

It is important for people with hypoglycemic-induced fatigue to alter their diets, incorporating high-fiber, protein-containing complex carbohydrates, such as oatmeal, into their meals, and consuming nutritious snacks during the mid-morning and afternoon. Complex carbohydrates and high-protein (from fish and vegetable sources) diets can also be useful in combating fatigue resulting from caffeine withdrawal.
Complete Encyclopedia Of Natural Healing by Gary Null PhD, page 106

"Although the phenomenon of caffeine withdrawal has been described previously, the present report documents that the incidence of caffeine withdrawal is higher (100 percent of subjects), the daily dose level at which withdrawal occurs is lower (roughly equivalent to the amount of caffeine in a single cup of strong brewed coffee or three cans of caffeinated soft drink), and the range of symptoms experienced is broader (including headache, fatigue and other dysphoric mood changes, muscle pain/stiffness, flu-like feelings, nausea/vomiting and craving for caffeine) than heretofore recognized."
Caffeine Blues By Stephen Cherniske MS, page 189