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Synonyms
- Ritalin®
Expected Turnaround Time
5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Serum or plasma
Volume
2 mL
Minimum Volume
0.5 mL
Container
Red-top (no additive) tube or green-top (heparin) tube; gel-barrier tubes not recommended
Collection
Transfer separated serum or plasma to a plastic transport tube. Collection time: Peak levels occur at 1-3 hours post dose; trough levels often not.
Storage Instructions
Submission/transport/storage: Freeze.
Stability Requirements
• Room temperature: Unstable
• Refrigerated: Unstable
• Frozen: 14 days
Causes for Rejection
Specimen received unfrozen
Test Details
Use
Therapeutic drug management
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Reference Interval
Therapeutic: 5.0−20.0 ng/mL
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 715300 | Methylphenidate, Serum | 3807-5 | 715301 | Methylphenidate, S | ng/mL | 3807-5 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf