Cymbalta is used to treat major depressive disorder and general anxiety disorder. It is also used to treat a chronic pain disorder called fibromyalgia, and to treat pain caused by nerve damage in people with diabetes (diabetic neuropathy).
Caffeine-withdrawal headaches can last up to 48 hours and can be as intense as a migraine headache. Withdrawal symptoms can begin 12 to 24 hours after the last cup of coffee and can last up to 1 week. These symptoms can include lethargy, extreme nervousness, irritability, sweating, headaches and shakiness.
Close-up of young woman with a headache. A caffeine withdrawal headache usually begins within 18 hours of reducing or eliminating caffeine from the diet, according to the National Headache Foundation. That headache is the worst about three to six hours after it begins and is usually completely gone without seven days.