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.
How Long Does Caffeine Withdrawal Last? The answer to this will depend on your level of consumption and the level you reduce your caffeine consumption to. In experimental studies, the incidence of headache was 50% and the incidence of clinically significant distress or functional impairment was 13%.