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Serum/plasma concentration of escitalopram (a selective serotonin reuptake inhibitor, SSRI)

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

This test measures the amount of escitalopram, a medication used to treat depression, anxiety, and other mood disorders, in your blood.

Quick summary

["Knowing your escitalopram levels helps your healthcare provider monitor your dose and adjust it for optimal effectiveness and safety."]

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

Key facts at a glance

LOINC
73392-3
Short code
Escitalopram ind plt IgM SerPl Ql FC
Synonyms
Escitalopram 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 if you’re taking escitalopram to check if the medication is working properly, adjust your dose, or detect potential side effects. It can also be used to confirm compliance with your treatment plan.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or a blood sample drawn from a vein. If testing plasma is preferred, you might be asked to fast for a few hours before the test.

What the Results Mean

Results provide a snapshot of your current escitalopram levels in your blood. While reference ranges can vary by lab, they help guide whether your dose is therapeutic or if adjustments are needed.

Common Reasons for Testing

Your doctor might test escitalopram levels if you’re experiencing symptoms like mood swings, fatigue, or lack of improvement after starting or changing your dose. It can also help identify if you’re taking too much or too little of the medication.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Escitalopram Level

Frequently asked questions

How long does it take to get the results?
Results are typically available within 1 to 3 business days, depending on your lab and testing method. Follow-up with your healthcare provider to discuss the findings.
What if my levels are too high or too low?
High levels may indicate overdose or improper metabolism, while low levels could mean the medication isn’t working as intended. Your doctor will adjust your dose based on these results to improve symptoms and minimize side effects.
Can I eat or drink before the test?
For serum/plasma testing, fasting for 8–12 hours before the test is often recommended. If you have questions about diet or timing, ask your lab technician or doctor.
  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