Phenytoin
Specimens Requirements:

Patient Preparation:None
Specimen Type: Serum
Container / Tube Type:Plain, Red top, 6mL
Minimum Volume:6 mL
Collection instructions:NA
Sample Stability:

Ambient (20 – 25°C): 8 h (after separation from cells)
Refrigerate (2 – 8°C​):1 week / 4 days (after separation from cells)​