Caffeine's dark side: unraveling its role in triggering anxiety and panic disorders

Caffeine, widely consumed for its stimulating effects, has been increasingly recognized for its anxiogenic and panicogenic potential, particularly in individuals with panic disorder (PD). This systematic review and meta-analysis examine the acute effects of caffeine on panic attacks and subjective anxiety in patients with PD compared to healthy controls. The findings underscore caffeine's significant impact, revealing that over 50% of PD patients experience panic attacks following caffeine intake, with none reported after placebo. In contrast, less than 2% of healthy individuals reported similar effects, highlighting the heightened sensitivity of PD patients to caffeine.

The review also identifies a consistent increase in anxiety levels among PD patients following caffeine consumption, with a more pronounced effect compared to healthy controls. The restricted range of caffeine doses in the studies analyzed—primarily equivalent to the caffeine content of five cups of coffee—limited the exploration of dose-response relationships. Despite this limitation, the results strongly suggest that caffeine targets key mechanisms underlying panic disorder, including the adenosine receptor system, which is implicated in anxiety regulation.

Clinically, these findings emphasize the importance of individualized recommendations for caffeine consumption in patients with PD. While moderate caffeine intake may not pose significant risks for the general population, those with PD or other anxiety disorders should be cautious, as caffeine can exacerbate symptoms and trigger panic attacks. Further research is needed to explore the interactions between caffeine and other therapeutic interventions, as well as to refine guidelines for safe caffeine consumption in vulnerable populations.