Thioridazine Test
Short Name: Thioridazine
Also known as: Thioridazine Level, Thioridazine Serum Level
Thioridazine Test test available at DNA Labs India for ₹15,000. Uses Gas Chromatography (GC) on Serum samples. Results in Results are typically available within 2-3 weeks after the sample reaches the laboratory. For samples submitted by the 7th of the month, reports are dispatched after 2-3 weeks.. 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 Thioridazine Test is to measure the serum concentration of thioridazine to ensure that the drug level remains within the therapeutic window. This helps to optimize treatment efficacy, minimize the risk of toxicity, assess patient compliance, and guide dosage adjustments in individuals on thioridazine therapy.
- Test Code
- 3687
- Price
- ₹15,000
- Sample Type
- Serum
- Result Time
- Results are typically available within 2-3 weeks after the sample reaches the laboratory. For samples submitted by the 7th of the month, reports are dispatched after 2-3 weeks.
- Fasting Required
- No
- Method
- Gas Chromatography (GC)
Sample Collection
No special preparation or fasting is required. Continue prescribed medications unless advised otherwise by the treating physician.
Method: Venipuncture
Laboratory Analysis
A venous blood sample is collected by a trained phlebotomist. The procedure is quick and causes minimal discomfort.
Report Delivery
No specific precautions are required. Patients can resume normal activities immediately after sample collection.
Timeline: Results are typically available within 2-3 weeks after the sample reaches the laboratory. For samples submitted by the 7th of the month, reports are dispatched after 2-3 weeks.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the Thioridazine Test is to measure the serum concentration of thioridazine to ensure that the drug level remains within the therapeutic window. This helps to optimize treatment efficacy, minimize the risk of toxicity, assess patient compliance, and guide dosage adjustments in individuals on thioridazine therapy.
How to Prepare
- Sample should be collected in a Serum Separator Tube (SST).
- Minimum 1 mL of serum is required.
- The sample must be shipped refrigerated or frozen.
- A duly filled Test Send Out Consent Form (Form 35) is mandatory.
- Sample should be submitted by the 7th of the month to ensure timely reporting.
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"Thioridazine has a narrow therapeutic index; regular drug monitoring is essential to prevent cardiotoxicity and optimize antipsychotic efficacy."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic samples
- Incorrect container or sample type
- Insufficient sample volume (<1 mL serum)
- Sample not sent with mandatory consent form
- Sample received beyond stability period
Understanding Your Results
The drug level is below the therapeutic range, potentially leading to inadequate symptom control or indicating poor compliance.
Level: Subtherapeutic (< 0.5 mg/L)
The drug level is within the desired range, suggesting effective dosing with lower risk of side effects.
Level: Therapeutic (0.5–3.0 mg/L)
The drug level exceeds the therapeutic range, increasing the risk of cardiotoxicity, arrhythmias, and other adverse effects. Immediate dose reduction is advised.
Level: Toxic (> 3.0 mg/L)
Consult your psychiatrist or physician if you observe any symptoms such as irregular heartbeat, difficulty breathing, seizures, facial swelling, uncontrolled movements, or if your test result falls outside the therapeutic range. Do not adjust your medication without medical advice.
Limitations
- ⚠Single time-point levels may not reflect steady-state concentration
- ⚠Results should be interpreted with clinical findings
- ⚠Reference ranges may differ between laboratories
- ⚠Not a standalone tool for diagnosing schizophrenia
Risks & Considerations
- ●Minor bruising at the venipuncture site
- ●Slight bleeding or discomfort
- ●Rare risk of infection
Interfering Factors
- ●Co-administration of other drugs that affect CYP2D6 enzyme activity
- ●Smoking, which may lower thioridazine levels
- ●Hepatic or renal impairment altering drug metabolism
- ●Sample hemolysis or improper storage
- ●Therapeutic reference ranges may vary based on the assay method used
Compare With Similar Tests
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|---|---|---|---|---|---|
| Comparison | Thioridazine Test |
Frequently Asked Questions
What is the Thioridazine Test?
Why is the Thioridazine Test done?
Is fasting required before the Thioridazine Test?
How is the sample collected for the Thioridazine Test?
What is the normal reference range for thioridazine levels?
What does a high thioridazine level indicate?
What does a low thioridazine level indicate?
How often should the Thioridazine Test be repeated?
Are there any risks or side effects of the test?
How long does it take to get the Thioridazine Test report?
Does DNA Labs India provide home sample collection for this test?
What is the cost of the Thioridazine Test at DNA Labs India?
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