| Not official USP-NF text | ||||
| DIPHENHYDRAMINE HYDROCHLORIDE | ||||
| PF | LGS# | Brand | Type of Test | Additional Information |
| 12(1) | L1 | Nucleosil C18 | Assay | 15-cm, 5-µm |
| 12(1) | L1 | Partisil 10 ODS-3 | Assay | { Alternative reagent |
| 13(4) | L10 | ZORBAX CN | Assay | Reprinted 15(3) |
| 13(4) | L10 | ZORBAX CN | Identity | See Assay |
| 16(3) | G27 | None Cited | Organic volat. impurities | See Method I  467 |