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Pseudoephedrine in Urine (24-Hour Collection)

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

This test measures the amount of pseudoephedrine, a stimulant found in some cold and allergy medications, in your urine over a 24-hour period.

Quick summary

["Checks for recent use of certain over-the-counter medications."]

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

Key facts at a glance

LOINC
73184-4
Short code
Pseudoephedrine ind plt IgM SerPl Ql FC
Synonyms
Pseudoephedrine ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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 doctor may order this test to assess recent use of pseudoephedrine-containing products, such as decongestants, for reasons like monitoring substance use, verifying compliance with medication restrictions, or investigating symptoms linked to stimulant exposure.

What to Expect Before the Test

No special preparation is needed. You’ll collect your urine over a full 24-hour period, typically starting after the first void of the day and ending with the first void the following morning. Follow your healthcare provider’s instructions carefully to ensure accurate results.

What Happens During the Test

You’ll provide a 24-hour urine sample in a container provided by your lab. The sample is then analyzed to detect the presence and quantity of pseudoephedrine.

What the Results Mean

Results indicate the total amount of pseudoephedrine excreted in your urine over the 24-hour period. Higher levels may suggest recent use of pseudoephedrine-containing medications, while lower or undetectable levels indicate none or minimal exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Pseudoephedrine Urine Test

Frequently asked questions

What does a high level of pseudoephedrine in my urine mean?
A high level may indicate recent use of pseudoephedrine-containing medications, which can cause symptoms like increased heart rate, restlessness, or insomnia. It could also be used in medical contexts to assess compliance with medication restrictions or screen for substance use.
What if my results are normal?
Normal results suggest no detectable pseudoephedrine in your urine over the 24-hour period, meaning you likely did not use these medications recently. However, results can vary based on factors like metabolism and timing of medication use.
How long does it take to get my results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing schedule. Follow up with your healthcare provider for interpretation and next steps.
  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