| parent | Antiparkinsonian | LP31440-8 |
| child | Trihexyphenidyl | Serum or Plasma | Drug toxicology | LP390895-3 |
| child | Trihexyphenidyl | Urine | Drug toxicology | LP390896-1 |
| STATUS | ACTIVE |
| PartDisplayName | en-US | Trihexyphenidyl |
| DisplayName | en-US | Trihexyphenidyl |
LOINC Version: 2.81