| Source |
Blood |
| Mnemonic |
PPF |
| Specimen Requirements |
2 x 5 mL red top tubes, NOT SST
2.0 mL serum
Minimum Blood Volumes for Patients less than 45 kg (100 lb) Including Neonates and Pediatrics
Patient should be on drug at least 3 days prior to collection. Collect prior to morning dose. |
| Specimen Handling |
RECORD the following on requisition:
- time of last dose
- dosage regimen (amount & frequency)
- how long patient has been on drug at present dosage
- date and time of collection
|
| Additional Information |
For additional information, see Half-life and time to Steady State.
The correlation between dose and plama concentration is influenced by pharmacogenetics. |
| Testing Location |
Toxicology |
|
| Testing Frequency |
Monthly |
| Alternate Name(s) |
Rythmol |
| Reference Interval |
Therapeutic ranges indicate trough levels in serum under steady state conditions.
Therapeutic: 1.5 to 5.9 µmol/L
Toxic: not well defined |
