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Ritalin

Clinical System Name

Miscellaneous Test

Synonyms

Methylphenidate

Sample Requirements

Specimen: Whole Blood

Container(s): Red or Dark Green/Sodium Heparin

Preferred Vol: 5 mL

Minimum Vol: 1.2 mL

 

Note: Do not use gel separator tubes (i.e. no gold tops).

Peak levels occur at 1-3 hours post dose; trough levels often not detectable.

 

Processing Instructions

Reject due to:

Spin: Y

Aliquot: Y

Temp: -20 C

Storage location:  Spin blood - Do NOT use a gel separator! Freeze immediately 2 mL serum or plasma  in a plastic tube CPA freezer send-outs rack. Ship frozen on dry ice.

 

Off-site collection:

Stability

Specimen Type Temperature Time
Serum or Plasma Room temp N
  Refrigerated N
  Frozen Y

 

Availability

STAT Performed TAT
N Daily 1 w

 

Performing Laboratory

Medtox Laboratories

Department

Department:

Medtox Laboratories

402 West County Road D
St Paul, MN 55112
 

Phone Number: (800) 832-3244

 

 

Reference Range

 

  nG/mL
Range 5 - 20
Critical Value >40
Reporting Limit 1.0

 

Methodology

Method: LC/MS/MS

Analytical Volume: None specified

Limitations:

CPT Codes

82542

Send Out Instructions

 

Reference Test Name: Methylphenidate (Ritalin®)
Reference Test Number: 79
Instructions: Send out Mon - Thurs (on dry ice) overnight via FedEx using a Medtox requisition and a Medtox paid airbill.