== Norepi makes you think better == 

 I disagreed rather directly to your response to a question at the science reference desk, and decided to send you my reply directly to facilitate dialogue: 

 ::In response to your question specifically, no, being stressed does not make you think better. The Blood brain barrier prevents large molecules in the blood stream from entering the nervous system, protecting it from most infections. Although norepinephrine can be found in the brain and in the body in general, the norepinephrine produced by the adrenal glands doesn't reach the brain. Norepinephrine in the brain is produced by neurons and stays in the brain.  

 ::Besides, think pracitcally: when you're stressed, don't you find that you are more grumpy, unstable and more prone to making bad decisions? Do you personally think that you or those around you "think better" when you're stressed? Faster maybe, but better? 

 ::Moreover, although drugs that boost norepinephrine availability have been useed to treat ADHD, the general idea that having alot of neurotransmitter in general makes you think better is a little confused. Having alot of a neurotransmitter may sound good but it's usually not and often can result in psychiatric disorders of chemical imbalance. Dopamine is commonly used as an example: dopamine deficiency results in Alzheimers, and dopamine excess can cause Schizophrenia.