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.
Concussions can heal in a few weeks or longer than a year. Many factors affect healing. Factors which lengthen the time of healing are younger age, underlying adhd or learning difficulties, severity of injury, and genetics. If you are re-injured before complete healing, the time also significantly lengthens.