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.
With a Grade Two concussion, the symptoms are the same as a Grade One concussion, only the symptoms last about a half-hour. With a Grade Three concussion, sometimes referred to as a classic concussion, there is a loss of consciousness - no matter how brief. Regardless of the type of concussion, a person?s brain remains highly vulnerable for at least the next few days. Any additional concussions, which are sometimes called mini-concussions, can compound the damage that was inflicted by the first concussion.