| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/0376-8716(89)90071-9 | |
| Heroin | free resource | MedlinePlus Health Information | https://medlineplus.gov/heroin.html |
| Drug Use and Addiction | free resource | MedlinePlus Consumer Health Information | https://medlineplus.gov/druguseandaddiction.html |