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.
After effects of concussion. In some people, concussion symptoms can last a few months or more. This is known as post-concussion syndrome. Possible symptoms include: headaches ; dizziness ; problems with memory or concentration ; unsteadiness ; depression, anxiety and changes in behaviour ; See your GP if you still have symptoms after three months.