from a recreational point of view, which causes more permanent changes to the dopaminergic system relative to casual use. Blowing a few lines of uncorrupted cocaine (acts on the reuptake of dopamine by inhibiting dopamine active transport), or a medicinal dose of adderall/amphetamine salts (the meth precursors method of action causing dopamine receptors to produce more of the neurotransmitter). this isn't a poll of cardio health, but of downregulation damage.