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Serum predose arginine concentration (quantitative)

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

This test measures the amount of arginine in your blood before a dose of medication is administered. Arginine is an essential amino acid involved in metabolism and the production of important substances like hormones and growth factors.

Quick summary

["This test helps assess how your body processes certain medications or evaluates metabolic function before treatment begins."]

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

Key facts at a glance

LOINC
47933-7
Short code
GH pre dose Arg+Ins SerPl-aCnc
Synonyms
GH pre dose Arg+Ins SerPl-aCnc
Category
hormone
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 to monitor how your body handles arginine, especially if you’re receiving medications that rely on arginine metabolism. It could also be part of a broader evaluation for conditions affecting amino acid metabolism or kidney function.

What to Expect Before the Test

No special preparation is typically required, but you may be asked to fast for a few hours before the blood draw. Bring any medications or supplements you’re currently taking to your appointment.

How the Test Works

A small sample of blood is collected from a vein, usually in your arm. The sample is sent to a lab where it is analyzed to measure arginine levels using a specialized method, such as immunoassay or chromatography.

Possible Results and Interpretation

Results are compared to general reference ranges, though individual ranges can vary. Abnormal results may signal issues like metabolic disorders, kidney problems, or how your body processes certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

What does my arginine level mean?
Low arginine levels might indicate metabolic disorders, kidney dysfunction, or certain genetic conditions. High levels could suggest overproduction of arginine or impaired metabolism. Your healthcare provider will discuss these findings in the context of your overall health and treatment plan.
How often will I need this test?
The frequency depends on your medical condition and treatment. Your provider will determine how often this test should be repeated, whether it’s part of routine monitoring or tied to specific medical needs.
Can I eat or drink before this test?
Generally, fasting is not required, but follow your provider’s instructions. If you’re unsure, ask before your appointment to avoid any delays or inaccuracies in 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