| Similarity | Rank | |
|---|---|---|
| LORTAB | 0.946 | 43915 |
| VICODIN | 0.935 | 44698 |
| HYDROCODONE | 0.934 | 38109 |
| OXYCODONE | 0.933 | 46737 |
| OXYCONTIN | 0.931 | 53820 |
| PERCOCET | 0.927 | 44796 |
| PERCODAN | 0.927 | 70179 |
| DARVON | 0.926 | 90925 |
| VALIUM | 0.918 | 43351 |
| MORPHINE | 0.915 | 61554 |
| CARISOPRODOL | 0.912 | 47824 |
| PROPOXYPHENE | 0.909 | 66758 |
| DARVOCET | 0.906 | 44239 |
| METHADONE | 0.906 | 44502 |
| XANAX | 0.904 | 44454 |
| NORCO | 0.903 | 45727 |
| ADDERALL | 0.899 | 41836 |
| CLONAZEPAM | 0.897 | 64424 |
| CODEINE | 0.897 | 30981 |
| PHENERGAN | 0.894 | 67750 |
| DIAZEPAM | 0.892 | 41276 |
| AMPHETAMINE | 0.887 | 58180 |
| ALPRAZOLAM | 0.884 | 54478 |
| ULTRAM | 0.884 | 42384 |
| HYDROXYZINE | 0.883 | 74412 |