fentanyl - SERP Analysis

https://www.samhsa.gov/

https://www.dea.gov/factsheets/fentanyl

https://www.hhs.texas.gov/services/mental-health-substance-use/mental-health-substance-use-resources/fentanyl-one-pill-kills

https://medlineplus.gov/druginfo/meds/a601202.html

https://www.deadiversion.usdoj.gov/drug_chem_info/fentanyl.pdf

https://harmreduction.org/issues/fentanyl/

https://www.cdph.ca.gov/Programs/CCDPHP/sapb/pages/fentanyl.aspx

https://www.canada.ca/en/health-canada/services/substance-use/controlled-illegal-drugs/fentanyl.html

https://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750022.html