| Record No. | Name | No. of Entries |
| 751 | Trimethylcolchicinic acid methyl ether | 2 |
| 752 | Triprolidine | 1 |
| 753 | Tubocurarine | 3 |
| 754 | Tuscodin | 1 |
| 755 | Tylenol w/codeine | 1 |
| 756 | Ukrain | 4 |
| 757 | UTEN | 1 |
| 758 | Xylopine | 36 |
| 759 | Xylopine hydrochloride | 1 |
| 760 | Xylopinine | 5 |
| 761 | Zijinlongine | 1 |