Caffeine dependence occurs when a person regularly consumes caffeine and develops a reliance on it to function normally. This can lead to withdrawal symptoms, such as headaches, fatigue, and irritability, when caffeine intake is reduced or stopped. Caffeine is commonly found in beverages like coffee, tea, and energy drinks. Individuals with caffeine dependence may find themselves needing larger amounts to achieve the same effects, such as increased alertness or improved mood. While moderate caffeine consumption is generally considered safe, excessive intake can lead to negative health effects, including anxiety and sleep disturbances.