Centers for Disease Control (CDC)- https://www.cdc.gov/overdose-prevention/about/stimulant-overdose.html
                                                            https://www.cdc.gov/stop-overdose/caring/polysubstance-use.html
Substance Abuse Mental Health Services Administration (SAMHSA)- https://www.samhsa.gov/substance-use/learn/stimulants
Partnership To End Addiction- https://drugfree.org/drugs/what-are-stimulants/
                                                     https://drugfree.org/article/school-stress-study-drugs-helpful-harmful/
Drug Enforcement Administration (DEA)- https://www.dea.gov/onepill