Test library
Tricyclic Antidepressant Test
The TCA drug test measures tricyclic antidepressants in a blood serum sample. It is used to detect these medications and can help assess levels in clinical monitoring or an evaluation of possible toxicity.
Order TCA Drug Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order TCA Drug Test- Typical turnaround
- 1-3 business days
- Starting price
- From $499
- Results
- Confidential, online
Quick answer
The TCA drug test detects tricyclic antidepressants, a class of older medications used for depression, nerve pain, and some other conditions. It is performed on a serum sample and can be used to confirm presence of the drug or to help assess levels. Because tricyclic antidepressants have a narrow margin between therapeutic and harmful amounts, testing can be important in clinical settings. A qualified healthcare provider interprets the result.
What this test measures
Tricyclic antidepressants work by affecting chemical messengers in the brain, and they are prescribed for depression, certain types of pain, and some other disorders. They have a relatively narrow therapeutic window, meaning the gap between an effective amount and a harmful one is small compared with many modern medications. Measuring serum levels helps clinicians stay within a safe range.
The test uses a blood sample, and the serum is analyzed with an immunoassay screen or a more specific chromatographic method. Some laboratories offer a screen alone, while others include confirmation and quantitation. The specific tricyclic compounds detected depend on the panel, and results are reported against laboratory cutoffs.
This test can be requested for therapeutic drug monitoring, to investigate a suspected overdose, or when a result needs confirmation. It is not a diagnosis of depression or any other condition. A qualified healthcare provider uses the level together with the person's medication history, symptoms, and other clinical information.
- Tricyclic antidepressants (screen)
- Amitriptyline
- Nortriptyline
- Imipramine
- Desipramine
- Doxepin
- Clomipramine
- Serum level quantitation of detected tricyclics
Why people order this test
- Detect tricyclic antidepressants in a serum sample
- Support therapeutic drug monitoring in clinical care
- Help evaluate a suspected overdose
- Confirm a screening result with a more specific method
- Investigate medication exposure when clinically indicated
- Provide objective information for a treating provider
How to prepare
No fasting is usually required. The timing of the blood draw relative to the last dose can affect the level, so follow the collection instructions provided by the laboratory and share a current medication list with the ordering provider.
Understanding your results
Results are typically available within one to three business days. The report shows which tricyclic compounds were detected and, when performed, their concentrations. A qualified healthcare provider interprets the values with the clinical context; this test is not medical advice.
Tricyclic Antidepressant Test by state
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Connecticut
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Florida
Tricyclic Antidepressant Test across Florida.
Georgia
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Frequently Asked Questions
What does the TCA drug test detect?
It detects tricyclic antidepressants and related compounds in a serum sample, using a screen and sometimes a confirmation or quantitation step.
Why are tricyclic antidepressant levels measured?
These medications have a narrow therapeutic range, so measuring levels can help a provider keep the amount in a safe and effective range.
Do I need to fast?
Fasting is usually not required, but follow any timing instructions the laboratory provides.
Can other drugs affect the result?
Some other substances can cross-react with the initial screen, which is why a more specific confirmation method may be used.
Is this test a diagnosis?
No. It is a laboratory measurement, and a qualified healthcare provider interprets it with your full clinical picture.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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