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 A Concussion Last. Concussion happens when a severe blow to the head or any hit to the body that jars or shakes the mind inside the skull. Head is a very sensitive part of human body. Although it appears very strong, as it is protected by a thick skull, it is one part whose injury can cause sudden and on spot death.