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.
It is important to realize that the danger zone following a concussion can last up to 48 hours, with the first 24 hours being the most critical. The danger is that bleeding will occur in the brain (especially likely if a person is taking an anticoagulant medication such as warfarin) or that a blood clot can form.