The good news is that the caffeine withdrawal duration typically lasts for 2 days to about a week. It starts half a day to about a day after caffeine abstinence and peaks at about 2 days. Occasional reports slightly longer durations.
How much regular caffeine intake causes withdrawal? Abstinence from regular consumption of as low as a once a day cup of coffee, or 2 cans of soda has been reported to cause caffeine withdrawal. The probability of incidence of caffeine withdrawal is reported to be 50% of the population from a recent experimental study of healthy caffeine consumers that have stopped for about a day. But when minor caffeine withdrawal symptoms are also included, that ratio increases higher.
The table below lists the general caffeine withdrawal symptoms reported from various studies:
|struggle for concentration||lack of attentiveness|
|tiredness||fatigue, enervation, lethargy, prostration|
|drowsiness||doziness, somnolence, chronic sleepiness|
|moodiness||short temper, touchiness|
|the blues||funk, doldrums|
|trouble with alertness||degradation of perceptiveness|
The official word from the ICD-10 of the World Health Organization and the DSM-IV American Psychiatric Association is that caffeine withdrawal is likely to cause “clinically significant distress or impairment in functioning”.