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Serum or plasma promazine concentration

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

This test measures the amount of promazine, a medication used to treat certain allergic reactions, seizures, or as a sedative, in your blood.

Quick summary

["This test helps monitor drug levels to ensure safe and effective dosing."]

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

Key facts at a glance

LOINC
75769-0
Short code
Promazine Bld/Urn Ql Scn
Synonyms
Promazine Bld/Urn Ql Scn
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
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 Might Be Ordered

Your healthcare provider may order this test if you’re taking promazine to check if your blood levels are within the recommended range. It helps prevent side effects like dizziness, confusion, or low blood pressure that can occur at higher concentrations.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on promazine, your provider will discuss timing with you to ensure accurate results.

What the Results Mean

Results show how much promazine is in your blood. Low levels may mean the medication isn’t working as intended, while very high levels could indicate overdose or improper dosing. Your provider will interpret these results in the context of your medical history and symptoms.

Common Causes of Abnormal Results

High promazine levels might be due to recent dosing, improper administration, or liver/kidney issues that slow drug clearance. Low levels could suggest missed doses or rapid metabolism. Other conditions (like liver disease) may also affect how your body processes promazine.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Promazine Level

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your healthcare provider will contact you once they have the results.
Can I eat or drink before this blood test?
You can eat and drink normally unless instructed otherwise. Most blood tests don’t require fasting, but check with your provider if you have questions about timing.
What should I do if I feel dizzy or lightheaded after the blood draw?
Rest for a few minutes afterward and stay hydrated. If symptoms persist or worsen, contact your provider immediately. They may adjust your medication schedule if needed.
  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