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Serum or plasma concentration of haloperidol (antipsychotic medication)

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

This test measures the amount of haloperidol, a medication used to treat certain mental health conditions, in your blood.

Quick summary

["Helps monitor your medication levels to ensure safety and effectiveness."]

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

Key facts at a glance

LOINC
75760-9
Short code
Haloperidol Bld/Urn Ql Scn
Synonyms
Haloperidol 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 Is Done

Your healthcare provider may order this test if you’re taking haloperidol to check whether your dose is appropriate. It helps prevent side effects like dizziness, rapid heartbeat, or unusual movements, and ensures the medication is working as intended.

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 compared to a general reference range, but your specific range may vary based on your health and dose. Low levels may indicate insufficient medication, while high levels could signal side effects or improper metabolism.

Possible Side Effects

Haloperidol can cause side effects like drowsiness, restlessness, or movement disorders. If you experience severe symptoms (e.g., extreme dizziness, confusion), contact your provider immediately.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Haloperidol Level

Frequently asked questions

How often should I get this test?
Your provider will determine the timing based on your medication schedule, symptoms, and lab results. Typically, tests may be done weekly or monthly to adjust doses safely.
Can I drink alcohol before this test?
No, avoid alcohol for 24 hours before testing, as it may affect blood test accuracy or interfere with haloperidol metabolism.
What if my levels are too high or too low?
If levels are too high, your provider may reduce your dose or switch medications. If too low, they may increase your dose under close supervision to avoid side effects.
  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