What you wrote is not definitive.<p>What is the cause of ADHD?  There is no physical test for it and its cause is unknown.  Some experts believe it is caused by other things, like patterns of thinking.<p>There is absolutely no evidence that millions of people have a physical biological issue where a stimulant effects them differently than normal people.<p>An amphetamine is an amphetamine is an amphetamine.<p>And:<p>A new study challenges the popular idea that dysfunction in dopamine — a chemical that controls the brain’s reward and pleasure centers — is the main cause of attention deficit hyperactivity disorder (ADHD).
<a href="http:&#x2F;&#x2F;psychcentral.com&#x2F;news&#x2F;2013&#x2F;11&#x2F;02&#x2F;chemical-imbalance-is-probably-not-behind-adhd&#x2F;61512.html" rel="nofollow">http:&#x2F;&#x2F;psychcentral.com&#x2F;news&#x2F;2013&#x2F;11&#x2F;02&#x2F;chemical-imbalance-i...</a><p>In truth, the “chemical imbalance” notion was always a kind of urban legend- - never a theory seriously propounded by well-informed psychiatrists. -
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