Final answer:
Headache is the most consistent withdrawal symptom after chronic caffeine use. Dependence can cause various health issues, and withdrawal symptoms often include headaches, irritability, and difficulty concentrating.
Step-by-step explanation:
The most consistent withdrawal symptom after chronic caffeine use is indeed a headache. Caffeine, a central nervous system stimulant, is the most widely consumed psychoactive substance in the world and is found in various products such as coffee, tea, soda, and energy drinks. While moderate consumption is generally not harmful, chronic and excessive intake can lead to dependence and a variety of health issues. When a person who regularly consumes caffeine stops doing so, they often experience withdrawal symptoms such as headaches, irritability, and difficulty concentrating. These symptoms can be part of a broader condition known as substance dependence, as seen in a case study involving a woman consuming large quantities of soda, resulting in both mental and physical health concerns. Withdrawal symptoms typically peak in intensity a day or two after cessation and then begin to subside, although cravings may persist for a longer period.