| Similarity | Rank | |
|---|---|---|
| butalbital | 0.921 | 84120 |
| propoxyphene | 0.916 | 97081 |
| fioricet | 0.911 | 63022 |
| hydrocodone | 0.907 | 24091 |
| modafinil | 0.905 | 63926 |
| tramadol | 0.901 | 16401 |
| zolpidem | 0.900 | 53347 |
| Tramadol | 0.899 | 32170 |
| lorazepam | 0.897 | 45187 |
| ultram | 0.897 | 35797 |
| temazepam | 0.896 | 84878 |
| alprazolam | 0.895 | 48309 |
| Ultram | 0.892 | 46580 |
| Hydrocodone | 0.892 | 59726 |
| vicodin | 0.888 | 27357 |
| Clonazepam | 0.887 | 76585 |
| darvocet | 0.887 | 81925 |
| Alprazolam | 0.886 | 87921 |
| hydroxyzine | 0.884 | 90513 |
| Lorazepam | 0.883 | 88737 |
| phentermine | 0.881 | 22944 |
| valium | 0.881 | 31382 |
| prevacid | 0.878 | 64911 |
| provigil | 0.877 | 75909 |
| lortab | 0.877 | 60147 |