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Pathology and Laboratory Medicine
Test Catalogue

Para Aminosalicylic Acid (PAS)


​Ordering Recommendation
  • ​​See the Pharmacokinetics Lab (PK) requisition on the National Jewish Health website for collection timing (e.g. Number of hours from time of dose to time of peak concentration)

​Specimen Requirements​

  • ​Serum
​Collection Procedure
  • Centrifuge and aliquot as soon as possible
  • Freeze within 24 hours
​Required Volume
  • ​Optimal Volume: One or two 4 mL Full collection tubes
  • Minimum Volume:  2 mL serum
    (Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
  • Pediatric Volume:  0.5 mL serum
  • Ship frozen on dry ice
Grounds for Rejection​

Testing Information​ ​

  • ​Shipped as received, Monday to Thursday
Testing Site​
  • ​Referred out by St. Paul’s Hospital Laboratory

Results Reporting​
  • Within 2-7 day turn around time by testing laboratory
​Clinical Interpretation
  • A bacteriostatic agent used against tubercle bacilli
Alternate Test Names​
  • p-Aminosalicylic acid
SHR LIS Test Code​
  • ​PAMIN (For Laboratory Use Only)
​ ​Test Ordering Requirements
​Preferred Specimen Collection
  • Collect peak level 6 hours after dose; to test for delayed drug absorption, a second sample may be collected 4 hours after the peak
  • Specimen should be centrifuged and aliquotted as soon as possible, and frozen within 24 hours after collection
​Forms Required
  • ​Fully complete Pharmacokinetics Lab (PK) requisition, including drug dose amount, frequency, method, and date and time of last dose prior to draw located on the National Jewish Health website
​Clearance Required
  • ​Ordering physician must have test approved by the Microbiologist On Call through RUH switchboard


​If ​you choose to print this information, it is valid only on date of print.

Laboratory Controlled Document LSM-723 v4

Last Modified: Friday, September 14, 2018 |
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