My understanding is that ADHD patients are in a constant unsatisfying "underexcited" state, so they will do anything to find exciting things to do. Amphetamines pulls them up to normal levels.
Give the same substance to someone already at a normal level and he will become overexcited.
Just like putting weights on a scale can balance an unbalanced scale or unbalance an balanced scale.
Give the same substance to someone already at a normal level and he will become overexcited.
Just like putting weights on a scale can balance an unbalanced scale or unbalance an balanced scale.