Skip to content

Serum/plasma concentration of escitalopram (antidepressant medication)

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

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

Quick summary

["Knowing your escitalopram level helps your healthcare provider check if the dose is working effectively."]

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

Key facts at a glance

LOINC
73393-1
Short code
Escitalopram ind plt IgG SerPl Ql FC
Synonyms
Escitalopram 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 to monitor your response to escitalopram, ensure it’s at an appropriate level, or adjust your dose if needed. It can also help detect potential side effects or drug interactions.

What to Expect Before the Test

No special preparation is usually required. You may be asked to fast for 8–12 hours before the test if blood is drawn from a vein, but this depends on your healthcare provider’s instructions.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. The process is quick and typically causes only a minor pinch. The blood sample is sent to a lab for analysis.

What the Results Mean

Results help your doctor determine whether escitalopram is working as intended. Low levels might suggest the dose isn’t enough, while very high levels could indicate improper absorption or other issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Monitoring escitalopram levels is important for managing depression or anxiety effectively. It helps prevent side effects like fatigue, nausea, or an increased risk of suicidal thoughts, while ensuring the medication remains effective over time.

Short name

Escitalopram Level

Frequently asked questions

Why might my doctor order this test?
Your doctor may order this test if you’re new to escitalopram, experiencing symptoms that don’t improve, or if you have concerns about side effects. It’s also used to confirm whether the medication is working as expected.
What do my results indicate?
Results show the concentration of escitalopram in your blood. If levels are too low, your dose may need to be increased. If levels are too high, your doctor may adjust the medication or investigate other factors.
Can I eat or drink before this test?
Follow your doctor’s instructions, but generally, fasting for 8–12 hours before a blood draw is common unless specified otherwise.
  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