Collection Notes: Collect as a trough just before the next dose. Plasma should be physically separated from cells as soon as possible with a maximum limit of 2 hours from the time of collection. Centrifuge and physically separate the plasma using a plastic transfer pipette into a separate plastic transfer tube.
Clinical Utility: Valproic Acid is used in the treatment of seizures and to treat migraine headaches. Valproic Acid levels are useful for monitoring optimal therapeutic levels and for assessing toxicity.
Plasma (1 mL), EDTA
Ambient 5 Days
Refrigerated 7 Days
Frozen 30 Days
Plasma (1 mL), Li Heparin
Ambient 5 Days
Refrigerated 7 Days
Frozen 30 Days
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