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Methylphenidate & Metabolite, Blood Level

Mnemonic:    [Methylph]
Name:    Methylphenidate & Metabolite, Blood Level
Specimen:    2 mL serum from a Red top tube. Do not use GEL barrier tubes. Plasma from an EDTA is also acceptable. Do NOT use gel tubes.

Specimen should be collected one to six hours post dosage.

Remove the serum/plasma from the cells ASAP. The separated sample should be frozen in the transport tube within 6 hours of collection
Minimum Spec:    1 mL
Transport Temp:    Critical Frozen sample. Freeze immediately and transport frozen.
Spec Stability:    Stable 6 hours ambient.
Ref Lab/Code:    ARUP 2003114
  Method:    Liquid Chromatography/Tandem Mass Spectrometry
Note:    Reported as: Methylphenidate and ritalinic acid levels

Positive Cutoff:
Methylphenidate: 1 ng/mL
Ritalinic acid: 10 ng/mL