| Similarity | Rank | |
|---|---|---|
| butalbital | 0.905 | 84120 |
| fioricet | 0.902 | 63022 |
| propoxyphene | 0.891 | 97081 |
| carisoprodol | 0.887 | 71878 |
| hydrocodone | 0.884 | 24091 |
| lortab | 0.883 | 60147 |
| provigil | 0.882 | 75909 |
| vicodin | 0.875 | 27357 |
| ultram | 0.864 | 35797 |
| Hydrocodone | 0.862 | 59726 |
| modafinil | 0.856 | 63926 |
| norco | 0.850 | 83110 |
| temazepam | 0.848 | 84878 |
| atenolol | 0.847 | 61217 |
| hydroxyzine | 0.843 | 90513 |
| phenergan | 0.841 | 69531 |
| apap | 0.839 | 96514 |
| aciphex | 0.834 | 87603 |
| zolpidem | 0.834 | 53347 |
| diethylpropion | 0.833 | 89331 |
| alprazolam | 0.832 | 48309 |
| Darvocet | 0.831 | 87417 |
| ambien | 0.831 | 34089 |
| Ultram | 0.831 | 46580 |
| klonopin | 0.829 | 49923 |