Methylphenidate & Metabolite
Ritalin, ARUP #3000253, EPIC: LAB6629, SOFT: XMPN
Specimen Collection Criteria
Collect (preferred specimen): One Gray-top Sodium Fluoride/Potassium Oxalate tube.
Also acceptable: One plain Red-top, Lavender-top EDTA, or Green-top Sodium Heparin tube.
Do not use Serum Separator Tubes.
Time of Collection: 1-6 hours post dosage.
Critical frozen. Separate samples must be submitted when multiple tests are ordered. Send specimen for processing immediately after collection.
Physician Office/Drawsite Specimen Preparation
Critical frozen. Centrifuge to separate serum or plasma from cells within 2 hours of collection. Transfer serum or plasma to a plastic transport tube and freeze (-20°C/-4°F or below) within 6 hours of collection.
Preparation for Courier Transport
Transport: 2.0 mL serum or plasma, frozen (-20°C/-4°F or below) immediatley. (Min: 1.0 mL)
- Serum Separator (SST) tubes.
- Hemolyzed specimens.
- Specimens not collected or processed as indicated.
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): 3 months
Specimen Storage in Department Prior to Disposal:
Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.
Sent to ARUP Laboratories, Salt Lake City, UT.
Results available in 2-8 days.
Methylphenidate: 1 ng/mL.
Ritalinic Acid: 10 ng/mL.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry.
This assay aids in the therapuetic monitoring of Ritalin® (methylphenidate). Ritalin® is a mild central nervous system stimulant. It is indicated as an integral part of a total treatment program which typically includes other remedial measures (psychological, educational, social) for a stabilizing effect in children with a behavioral syndrome characterized by the following group of developmentally inappropriate symptoms: moderate-to-severe distractibility, short attention span, hyperactivity, emotional lability, and impulsivity.
80360 (Alt. G0480).
ARUP #3000253, EPIC: LAB6629, SOFT: XMPN
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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills,
Grosse Pointe, Royal Oak, and Troy campuses.