Clozapine
Quest Diagnostics
Sample type: Serum
Requires fasting: No
Phlebotomy required
Details
Clozapine - Clozapine is an atypical antipsychotic agent. Norclozapine has minimal therapeutic activity.
- Clozapine
- Norclozapine
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
Details
Clozapine - Clozapine is an atypical antipsychotic agent. Norclozapine has minimal therapeutic activity.
What type of sample is required for this test?
2 mL serum collected in a red-top tube (no gel)
Test Resources
For more information, please consult your healthcare provider.
2–5 business days
Norclozapine: 25–400 mcg/L
Clozapine:
The therapeutic response begins to appear at 100 mcg/L
Refractory schizophrenia appears to require a therapeutic concentration of at least 350 mcg/L (trough, at steady state)
Toxic range: >900 mcg/L
Clozapine:
The therapeutic response begins to appear at 100 mcg/L
Refractory schizophrenia appears to require a therapeutic concentration of at least 350 mcg/L (trough, at steady state)
Toxic range: >900 mcg/L
Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics blood draw guide
Getlabs Mobile Phlebotomy
- Location: Sample collection at your home or office.
- Cost: $85 sample collection fee (paid during lab order checkout).
- Availability: Available in most locations – enter your ZIP code during checkout to confirm.
- Scheduling: Schedule your appointment here through your Fullscript account.
- Collection Instructions:
- Have your digital or printed requisition form and valid ID ready.
- Your phlebotomist will contact you by phone to coordinate arrival.
- More Info: Getlabs blood draw guide
Specimen
- Preferred Specimen(s): 2 mL serum collected in a red-top tube (no gel)
- Alternative: NA
- Minimum Volume: 1 mL
- Collection Instructions: NA
Storage and shipping instructions
- Transport Container: Transport tube
- Transport Temperature: Refrigerated (Cold Packs)
- Specimen Stability:
- Room temperature: 24 hours
- Refrigerated: 5 days
- Frozen: 30 days
- Reject Criteria:
- Gross hemolysis • Gel barrier/Serum separator tube (SST)
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
