Lithium concentration in whole blood
This test measures the amount of lithium, a medication, in your blood. Lithium is used to treat certain mental health conditions, such as bipolar disorder.
["Lithium levels help doctors monitor your medication dose and ensure safety."]
Key facts at a glance
- LOINC
- 25461-5
- Short code
- Lithium, Bld-sCnc
- Synonyms
- Lithium, Bld-sCnc
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 0.6
- Ref high
- 1.2
- Critical range
- — – 1.6 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- 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 a lithium blood test if you’re taking lithium medication to manage conditions like bipolar disorder or depression. Regular testing helps track your medication levels to prevent side effects or ensure it’s working properly.
What to Expect Before the Test
No special preparation is needed, but you may be asked to fast for 8–12 hours before the test if instructed by your doctor. Bring a list of all medications, including over-the-counter drugs and supplements, to share with your provider.
During the Test
A healthcare professional will draw blood from a vein in your arm using a small needle. You may feel a brief pinch, but the procedure usually takes less than 5 minutes. The blood sample is then sent to a lab for analysis.
After the Test
You can return to your normal activities immediately. There may be mild bruising or soreness at the injection site, but this typically resolves within a few days. If you experience unusual bleeding, excessive pain, or signs of infection, contact your provider.
Reference range
Therapeutic: 0.6-1.2 mmol/LN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Lithium levels help doctors determine if your medication dose is too high or too low. High levels can cause nausea, confusion, or even serious health risks, while low levels may mean the medication isn’t working effectively. Regular monitoring ensures safe and optimal treatment.
Short name
Lithium Blood Level
Frequently asked questions
How often should I get this test?
What does a low or high lithium level mean?
Can I eat or drink before the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 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 17, 2026. · Read our editorial policy