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PABA (p-aminobenzoic acid) in urine, measured by immunoassay

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of p-aminobenzoic acid (PABA), a naturally occurring compound found in urine, often assessed in connection with certain medications or metabolic studies.

Quick summary

["PABA urine tests help track drug metabolism or identify potential issues with how your body processes certain substances."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
9570-3
Short code
pABA 6h p 500 mg BT PO 6h Ur-mCnc
Synonyms
pABA 6h p 500 mg BT PO 6h Ur-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test to evaluate how your body metabolizes medications containing PABA, such as certain antibiotics or hair dyes. It can also be used in research or specialized diagnostic contexts, like assessing urinary tract health or metabolic pathways.

What Does the Test Measure?

PABA is a compound that can be excreted in urine after being broken down by your body. Elevated levels might suggest overuse of PABA-containing products or certain metabolic conditions.

Sample Collection and Preparation

You’ll likely provide a urine sample collected over a specific period (e.g., 24 hours), depending on the test instructions. Follow your provider’s guidance to ensure accurate results.

What Are Possible Results?

Results are qualitative (present/absent) or quantitative, depending on the test’s purpose. Your provider will interpret these in relation to your medical history and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

PABA Urine Test

Frequently asked questions

What Are Common Questions About This Test?
This test is generally not used for routine health screening. It may be ordered for specific medical reasons, such as monitoring drug metabolism or investigating unusual urinary patterns. If you’re taking medications containing PABA, discuss this with your provider before testing.
Will I Need to Prepare for This Test?
Preparation depends on the test’s instructions. Typically, you may need to collect urine over a set period (e.g., 24 hours) or follow dietary restrictions to avoid interference. Ask your provider for specific guidance.
How Long Does It Take to Get Results?
Results are usually available within a few days to a week, depending on lab processing times. Follow-up with your healthcare provider to discuss findings.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy