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.
According to WebMd, it can take several months for a concussion to heal. If symptoms appear during normal activity, patients are advised to stop that activity and rest. Concussions in children also take about 7 to 10 days to heal. The Mayo Clinic recommends that children wait for several days after symptoms disappear before resuming normal activity. Additionally, if symptoms in children persist after 24 hours, parents are advised to contact a doctor to rule out a more serious condition.