Matrix Search - Test Information
| Investigation | Phenytoin | | Indications | To determine pheytoin concentration in the blood and to ensure it is at an approriate level to avoid phenytoin toxicity. | | Specimen Type |  Ochre/Yellow top | | Request Form | Blood Sciences or Electronic | | Volume | Fill to line | | Turn around time for final test | 2 days | | Uncertainty of testing | Sample Pre Dose, refer to therapeutic drug ranges in `The Guide`. | | Reference range | 5.0 - 20.0 mg/L | | Action limits | Above 25 mg/L | | Appropriate testing /re-testing interval | 2 days | | Related tests | None | | HOW TO guides | None | | Information leaflets | None | | Publications | None | | Guidelines | None |
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