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Free Hydrocodone Mass Concentration in Urine (24-hour collection)

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

This test measures the amount of free hydrocodone, a pain medication, in your urine over a 24-hour period. It helps assess drug exposure without interference from other substances.

Quick summary

["This test helps track opioid use and potential misuse in urine samples."]

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

Key facts at a glance

LOINC
51955-3
Short code
DHC+Hydrocodol Free Ur-mCnc
Synonyms
DHC+Hydrocodol Free 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 This Test Is Done

Your healthcare provider may order this test if you’re suspected of opioid misuse, undergoing treatment for pain management, or required for a drug screening program. It helps monitor compliance with prescribed medications or detect unauthorized use.

What to Expect Before the Test

You’ll collect your urine in a special container over 24 hours. Follow your provider’s instructions carefully to ensure accurate results. Avoid certain foods, drinks, or medications that could interfere with the test.

How the Test Works

A lab analyzes your urine sample using a sensitive method to detect free hydrocodone. The test measures the drug’s concentration without counting metabolites or bound forms, providing a clearer picture of active exposure.

What the Results Mean

Results are typically reported in micrograms per milliliter (mcg/mL) or milligrams per liter (mg/L). Higher levels may indicate recent opioid use, while lower levels suggest reduced exposure. Your provider will interpret results in the context of your medical history and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Urine Free Hydrocodone (24h)

Frequently asked questions

How long does it take to get my results?
Results are usually available within 1–3 business days, depending on your lab’s processing time. Follow up with your provider to discuss the findings and next steps.
Can I drink alcohol before this test?
Alcohol itself won’t affect the test, but it may interfere with your overall health or pain management. Check with your provider for any restrictions related to your specific situation.
Will I need to fast before this test?
No fasting is required for this urine test. However, avoid certain medications or supplements that might influence your sample, such as some pain relievers or herbal products.
  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