It's no surprise that caffeine gets so much attention from scientists these days. At the same time, panic and other anxiety disorders have become the most common mental illnesses in the United States. When caffeine overlaps with these disorders, the result can be trouble. Runaway Anxiety Technically, caffeine works by blocking the depressant function of a chemical called adenosine, says Griffiths. For most of us, the result is a pleasurable sense of energy and focus.
Caffeine enhances alertness, concentration, and memory.
Drink more coffee than you're accustomed to, however, and that same stimulant can cause the jitters. Susceptible people experience caffeine's effects as signs of impending doom. Once that happens, anxiety can take on a life of its own. While many give up coffee, others give up whatever they were doing when struck by caffeine's disturbing side effects. Someone who downs coffee at breakfast and then hops on the freeway to work, for example, may attribute feelings of panic to rush-hour traffic rather than to caffeine.