The original paper has this quote: &quot;But cocaine makes the housekeeper throw away really important things, like mitochondria, which produce energy for the cell.&quot;<p>- <a href="http:&#x2F;&#x2F;www.eurekalert.org&#x2F;pub_releases&#x2F;2016-01&#x2F;jhm-nei011316.php" rel="nofollow">http:&#x2F;&#x2F;www.eurekalert.org&#x2F;pub_releases&#x2F;2016-01&#x2F;jhm-nei011316...</a><p>I think that most stimulant users are emotionally disturbed. Cocaine users tend to be depressed, amphetamine users tend to be angry, but while &#x27;high&#x27; they get to feel good (or &#x27;normal&#x27;), at least for a while.