Doxepin Test
Short Name: Doxepin Level
Also known as: Doxepin Serum Level, Doxepin Blood Test, Doxepin Drug Monitoring
Doxepin Test test available at DNA Labs India for ₹11,000. Uses LC-MS/MS on Serum samples. Results in Results available within 2-3 weeks after sample collection.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Ramarao Paidisetty
Consultant Biochemist · Reg: 21504
Last reviewed: September 7, 2026
Overview
The primary purpose of the Doxepin Test is to monitor the blood levels of Doxepin and its active metabolite Nordoxepin in patients undergoing treatment for depression, anxiety, or insomnia. It aids in assessing therapeutic efficacy, ensuring patient compliance, adjusting dosages, and preventing toxicity or adverse effects.
- Test Code
- 502
- Price
- ₹11,000
- Sample Type
- Serum
- Result Time
- Results available within 2-3 weeks after sample collection.
- Fasting Required
- No
- Method
- LC-MS/MS
Sample Collection
Collect sample more than 12 hours after the last oral dose of Doxepin. Ensure the patient has taken the medication as prescribed. Duly filled Test Send Out Consent Form (Form 35) is mandatory.
Method: Venipuncture
Laboratory Analysis
Standard venipuncture procedure using a Red Top tube without additives. Avoid using SST gel barrier tubes.
Report Delivery
Apply pressure to the puncture site to prevent bleeding. Store and ship the sample refrigerated or frozen as per stability guidelines.
Timeline: Results available within 2-3 weeks after sample collection.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the Doxepin Test is to monitor the blood levels of Doxepin and its active metabolite Nordoxepin in patients undergoing treatment for depression, anxiety, or insomnia. It aids in assessing therapeutic efficacy, ensuring patient compliance, adjusting dosages, and preventing toxicity or adverse effects.
How to Prepare
- Use a 3 mL Red Top (No Additive) tube
- Collect at least 1.5 mL of serum
- Do not use SST gel barrier tubes
- Ship sample refrigerated or frozen
- Complete Test Send Out Consent Form (Form 35)
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"Monitoring Doxepin levels is essential for optimizing treatment efficacy and minimizing side effects in patients with depression, anxiety, or insomnia. Regular testing helps adjust dosages based on individual metabolism."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic samples
- Insufficient sample volume
- Incorrect container (e.g., SST gel barrier tubes)
- Missing or incomplete consent form
- Sample collected less than 12 hours post-dose
Understanding Your Results
May indicate non-compliance, rapid metabolism, or subtherapeutic dosing. Consider patient adherence and dosage increase.
Level: Below Therapeutic Range
Suggests adequate drug exposure for efficacy. Continue current therapy and monitor symptoms.
Level: Within Therapeutic Range
Risk of toxicity, including side effects like drowsiness, dry mouth, or cardiac issues. Reduce dosage or reassess treatment.
Level: Above Therapeutic Range
Consult a doctor if Doxepin levels are consistently outside the therapeutic range, if symptoms of depression, anxiety, or insomnia persist or worsen, or if signs of toxicity (e.g., severe drowsiness, confusion, heart palpitations) occur.
Limitations
- ⚠Cross-reactivity with similar tricyclic antidepressants
- ⚠Results are time-dependent and must be interpreted in clinical context
- ⚠Does not indicate clinical response directly; symptoms should be assessed
- ⚠Limited to serum samples; other specimen types not validated
- ⚠May not reflect tissue concentrations accurately
Risks & Considerations
- ●Minor pain or bruising at puncture site
- ●Rare risk of infection or fainting
- ●No significant risks associated with the test itself
Interfering Factors
- ●Concurrent use of other medications (e.g., SSRIs, MAO inhibitors)
- ●Sample hemolysis or improper handling
- ●Time of sample collection relative to dosing
- ●Patient's liver or kidney function affecting metabolism
- ●Individual genetic variations in drug metabolism
Compare With Similar Tests
| Test | Doxepin Test | Amitriptyline Test | Serotonin Level Test | Benzodiazepine Test | Depression Screening Test |
|---|---|---|---|---|---|
| Comparison | Doxepin Test |
Frequently Asked Questions
What is the Doxepin Test?
Why is the Doxepin Test done?
How much does the Doxepin Test cost in India?
What sample is required for the Doxepin Test?
How is the Doxepin Test performed?
What are the normal ranges for Doxepin?
What do high levels of Doxepin indicate?
What do low levels of Doxepin indicate?
Are there any risks with the Doxepin Test?
How long does it take to get results?
Can I take the Doxepin Test at home?
What is the difference between Doxepin and Nordoxepin?
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