More than 85% of adults in the United States regularly consume caffeine. Average consumption is about 280 mg/day (APA, 2013). Caffeine is the only substance listed in the DSM-5 that does not include a category for a substance use disorder. In other words, at the present time, there is no caffeine use disorder. However, caffeine use disorder has been proposed as a potential diagnosis for future consideration and research. Nevertheless, the DSM-5 currently only includes diagnoses for caffeine intoxication and caffeine withdrawal.
Caffeine withdrawal can occur after abrupt cessation of daily use. Withdrawal can occur with relatively small daily doses. The average consumption in the United States is 280 mg/day. Yet people experience withdrawal from caffeine with consumption as low 100 mg/day. The symptoms usually begin 12-24 hours after last use. The symptoms may last for 2-9 days. Symptoms include headache, fatigue and difficulty concentrating; irritable or depressed mood; and even flu-like symptoms.
Effects of Caffeine: Caffeine intoxication
Caffeine intoxication includes nervousness, restlessness, and psychomotor agitation. People may ramble while speaking and their thoughts may not be well organized. More serious effects include tachycardia and cardiac arrhythmia. Extremely high doses of caffeine can result in death. Caffeine intoxication can have other serious consequences including the inability to function at school or work, and poor judgment.