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Phenylbutazone Concentration (Serum or Plasma)

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

This test measures the amount of phenylbutazone, a nonsteroidal anti-inflammatory drug, in your blood. It helps monitor your drug levels to ensure safe and effective treatment.

Quick summary

["Check your drug levels to avoid overdose or insufficient treatment."]

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

Key facts at a glance

LOINC
105979-9
Short code
Zolpidem phenyl-4-carb Ur Ql Cfm
Synonyms
Zolpidem phenyl-4-carb Ur Ql Cfm
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
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 taking phenylbutazone (a medication used to reduce pain and inflammation) and want to confirm your blood levels. It’s particularly important if you’re taking this drug long-term or at higher doses.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

Results are used to adjust your dose if needed, ensuring you get the right amount of medication without risking too much. Your provider will interpret these results in the context of your overall health and treatment plan.

Common Uses and Risks

Phenylbutazone is used for conditions like arthritis, gout, or inflammation. While effective, it can cause side effects like stomach upset, dizziness, or increased risk of bleeding. Regular monitoring helps balance benefits and risks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Phenylbutazone Level

Frequently asked questions

Why might my doctor want to check my phenylbutazone levels?
Your doctor may order this test if you’re taking phenylbutazone for a long time, at high doses, or if you have conditions like kidney or liver disease. It helps ensure your dose stays safe and effective.
What happens if my phenylbutazone level is too high or too low?
Too high could increase risks like stomach bleeding, kidney damage, or liver issues. Too low might mean your medication isn’t working as well. Your doctor will adjust your dose based on these results.
Can I eat or drink before this test?
You can eat and drink normally unless your doctor says otherwise. Avoid alcohol before the test, as it may affect your bloodwork results.
  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