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Ontogeny-related tramadol metabolite concentration (serum/plasma)

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

This test measures the concentration of tramadol’s active metabolites in your blood, which helps assess how your body processes this opioid pain medication.

Quick summary

["Helps monitor pain management and detect potential drug interactions or toxicity."]

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

Key facts at a glance

LOINC
97292-7
Short code
O-nortramadol TissCo Ql Scn
Synonyms
O-nortramadol TissCo Ql Scn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’re taking tramadol (a prescription opioid pain reliever) and want to check how well your body is breaking it down. It can also be used to adjust your dose, especially if you’re taking other medications that affect liver function or metabolism.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into a vein (usually in your arm) to draw blood. The process takes a few minutes, and you may feel a brief pinch. If you’re on blood thinners or have a history of bleeding issues, let your provider know.

What the Results Mean

Higher-than-expected levels may indicate your body isn’t processing tramadol efficiently, which could increase your risk of side effects like drowsiness, confusion, or overdose. Lower-than-expected levels might suggest your dose isn’t working as intended.

Common Causes of Abnormal Results

Factors like liver disease, certain medications (e.g., other opioids, antidepressants, or antifungals), or kidney problems can affect how tramadol breaks down. Smoking or drinking alcohol may also influence results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Tramadol Metabolite Level (Serum/Plasma)

Frequently asked questions

What symptoms might indicate a concern with tramadol metabolism?
If you experience severe drowsiness, confusion, slow breathing, or nausea/vomiting that doesn’t improve with dose adjustments, report these symptoms to your provider immediately. Chronic high levels may require a dose reduction or alternative pain management strategies.
How often should this test be done?
Frequency depends on your individual risk factors (e.g., liver function, other medications) and your provider’s recommendations. Some patients may need monitoring every few weeks or months, while others may only need it occasionally.
Can I fast before this test?
No fasting is required for this test, as it measures blood metabolites. However, always follow your provider’s specific instructions for any other tests you may have scheduled.
  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