Caffeine dependence is not in the DSM-IV because the evidence indicates that there is no withdrawal syndrome.

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Caffeine dependence is not included in the DSM-IV because while there is evidence of a withdrawal syndrome (e.g. headaches, irritability, fatigue), it is not considered severe enough to meet the criteria for a substance use disorder. However, caffeine withdrawal is now included in the DSM-5 as a mental disorder under the category of "Caffeine-Related Disorders."

Caffeine Dependence Is Not in the DSM-IV Because the Evidence