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Law Enforcement Seizures of Selected Synthetic Opioids From 2011 to 2016
| Drug | 2011 | 2012 | 2013 | 2014 | 2015 | 2016* |
| Fentanyl | 671 | 694 | 1041 | 5494 | 15,154 | 28,781 |
| Acetylfentanyl | — | — | 8 | 63 | 2001 | 1584 |
| Butyrylfentanyl | — | — | — | 7 | 204 | 91 |
| Furanylfentanyl | — | — | — | — | 4 | 1505 |
| U-47700 | — | — | — | — | 1 | 320 |
| AH-7921 | — | — | 2 | — | — | — |
| MT-45 | — | 1 | 2 | — | — | — |
Source: NFLIS database (personal communication).
*Dataset for 2016 is incomplete.
