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.
How long does it take to recover from the effects of a concussion? Many factors influence the course of recovery from a concussion, including the severity of the concussion, previous history of concussion, physical injury/pain symptoms, and personal history, and so the length of recovery will differ among individuals.