| Similarity | Rank | |
|---|---|---|
| LORTAB | 0.950 | 43915 |
| PERCOCET | 0.939 | 44796 |
| VICODIN | 0.936 | 44698 |
| OXYCODONE | 0.931 | 46737 |
| FLEXERIL | 0.928 | 81212 |
| HYDROCODONE | 0.921 | 38109 |
| TUSSIONEX | 0.919 | 70426 |
| CARISOPRODOL | 0.919 | 47824 |
| PROPOXYPHENE | 0.918 | 66758 |
| DARVOCET | 0.916 | 44239 |
| ULTRAM | 0.916 | 42384 |
| ULTRACET | 0.914 | 92923 |
| XANAX | 0.912 | 44454 |
| BUTALBITAL | 0.912 | 50181 |
| DARVON | 0.908 | 90925 |
| PERCODAN | 0.906 | 70179 |
| TRAMADOL | 0.905 | 35975 |
| FIORICET | 0.905 | 49676 |
| LORCET | 0.903 | 78525 |
| VALIUM | 0.903 | 43351 |
| METHADONE | 0.902 | 44502 |
| ZANAFLEX | 0.900 | 96843 |
| CODEINE | 0.900 | 30981 |
| VOLTAREN | 0.897 | 83412 |
| TENUATE | 0.897 | 53501 |