Skip to content

Carvedilol concentration in serum/plasma (quantitative drug level measurement)

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

This test measures the amount of carvedilol, a beta-blocker medication, in your blood. It helps your healthcare provider assess whether your dose is effective and safe for your condition.

Quick summary

["Your carvedilol blood level helps ensure proper dosing for heart conditions like high blood pressure or heart failure."]

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

Key facts at a glance

LOINC
73481-4
Short code
Carvedilol ind plt IgG SerPl Ql FC
Synonyms
Carvedilol ind plt IgG 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 if you’re taking carvedilol to manage conditions like high blood pressure, heart failure, or angina (chest pain). It helps check if your medication is working as intended and if your blood levels are within a safe range.

What to Expect Before the Test

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

What the Test Results Mean

Results are compared to a general reference range for carvedilol, but individual ranges can vary based on factors like kidney function and other medications. Low levels may indicate insufficient medication, while very high levels could signal toxicity.

Common Reasons for Testing

Doctors may test carvedilol levels to adjust your dose if you’re experiencing side effects (like dizziness or fatigue), if you’re switching medications, or if you’re having trouble controlling your condition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Carvedilol Level

Frequently asked questions

Why is this test important for my health?
This test helps ensure your carvedilol dose is neither too low (which may not control your symptoms) nor too high (which could cause side effects like low blood pressure or heart rhythm issues). It’s especially important for people with heart conditions or kidney problems.
What should I do if my carvedilol level is out of range?
If your level is too low, your doctor may increase your dose or check for other medications affecting it. If it’s too high, they may lower your dose or investigate potential interactions with other drugs.
Can I eat or drink before this test?
You can usually eat and drink normally unless your doctor specifies otherwise. Some tests require fasting, but carvedilol blood levels are generally checked without dietary restrictions.
  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