1 The scientific name for caffeine is 1,3,7-trimethylxanthine. 2  Caffeine is considered to be the most commonly used psychoactive drug in the world. 3  Coffee, soda, and tea are the most common sources of caffeine in the American diet.  Discontinuation of regular caffeine use may produce withdrawal symptoms.
For most patients, post concussion symptoms go away within a few days to several weeks after the original injury occurs.[In others, symptoms may remain for three to six months.In a small percentage of patients, symptoms may persist for years or may be permanent.
Most symptoms following a mild brain injury resolve in a short period of time (i.e., within days or weeks, sometimes up to a few months) even without treatment. Recent research shows that symptoms persisting longer than three to six months are exceedingly rare following mild head injury (Lovel, Collins, Iverson, et al., 2004; McCrea, Guskiewiz