Understanding Your Lab Test: What It Is, Why It Is Done, and What the Results Mean
This test measures the amount of acepromazine, a tranquilizer medication, in your blood to ensure proper dosing or check for appropriate levels.
{"Acepromazine is a medication used to calm or sedate patients before procedures","This test measures the drug level in your blood serum or plasma","It helps doctors ensure the drug level is within the therapeutic range","The test may be used to monitor for toxicity or verify compliance with treatment","Blood is drawn from a vein and sent to a laboratory for analysis"}
Key facts at a glance
- LOINC
- 3296-1
- Short code
- ACEP
- Synonyms
- Acepromazine SerPl-mCnc
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or plain red top tube
- Units
- N/A
- Ref low
- 50
- Ref high
- 150
- Critical range
- — – 250 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 18 years
- Method
- Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
- CPT
- 80307
- SNOMED
- 414589004
- Specimen volume
- 1.0 mL minimum (2.0 mL preferred)
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days
- Hemolysis max
- 50
- Lipemia max
- 100
- Icterus max
- 20
- TAT
- 24–72 hours
- Order
- routine
What is this test, and what does it check for in my body?
The Acepromazine test measures the concentration of acepromazine in your blood. Acepromazine is a phenothiazine-class medication that works by affecting certain chemicals in the brain to produce a calming or sedative effect. It is commonly used as a pre-medication before surgery or to manage anxiety and agitation in patients.
Why might my healthcare provider recommend that I have this test done?
Your healthcare provider may order this test for several reasons: to ensure you are receiving the correct dose of the medication, to monitor drug levels during long-term treatment, to check for signs of drug toxicity, or to verify that the medication is being taken as prescribed. The test helps doctors balance the medication's benefits with potential side effects.
How is this test performed, and what can I expect during the procedure?
A healthcare professional will draw a small sample of blood from a vein in your arm using a needle. The blood sample will be placed in a special tube and sent to a laboratory for analysis. The test measures the mass-to-volume ratio of acepromazine in your serum or plasma. You do not need to fast or make any special preparations before this test, unless your doctor instructs otherwise.
What do the results of this test mean, and how will my healthcare provider explain them to me?
Your test results will show the concentration of acepromazine in your blood. Therapeutic levels vary depending on the reason for treatment and individual factors. Your doctor will interpret your results considering your medical history, current symptoms, and other medications you may be taking. Too little medication may not provide adequate effect, while too much may lead to side effects or toxicity.
Reference range
Therapeutic range: 50-150 ng/mL. Toxicity may be observed at levels >200 ng/mLN/A
Collect trough specimen immediately before next dose. Inform laboratory of collection time and last dose administration time. Avoid hemolysis. Keep specimen protected from light.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Monitoring acepromazine blood levels is important for ensuring therapeutic efficacy while minimizing adverse effects. The medication can cause side effects including drowsiness, dizziness, low blood pressure, and in rare cases, movement disorders or heart rhythm abnormalities. Regular monitoring helps healthcare providers adjust dosages appropriately and detect any signs of accumulation or toxicity. This is particularly important for patients on long-term therapy, those with liver or kidney problems that affect drug metabolism, or those taking other medications that may interact with acepromazine.
Frequently asked questions
How long does it take to get results?
Are there any risks from the blood test?
Do I need to stop my medication before the test?
What happens if my levels are too high or too low?
Sources
- 1
- 2
- 3
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.
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 15, 2026. · Read our editorial policy