Compare this test’s laboratory options
Clozapine
Access Labcorp Draw · Access Medical Labs · Quest Diagnostics3 test optionsFrom $57.67
Clozapine
Access Labcorp Draw · Access Medical Labs · Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
DetailsClozapine is an antipsychotic medication used primarily to treat schizophrenia in patients who have not responded to other treatments. A Clozapine blood level test measures the amount of the drug in the blood to ensure it is within a therapeutic range and to avoid toxicity. Monitoring is crucial because clozapine can cause serious side effects, including agranulocytosis (a dangerous drop in white blood cells), requiring regular blood count checks.
What type of sample is required for this test?Plasma
Test ResourcesFor more information, please consult your healthcare provider.
Additional test information
Clozapine is an antipsychotic medication used primarily to treat schizophrenia in patients who have not responded to other treatments. A Clozapine blood level test measures the amount of the drug in the blood to ensure it is within a therapeutic range and to avoid toxicity. Monitoring is crucial because clozapine can cause serious side effects, including agranulocytosis (a dangerous drop in white blood cells), requiring regular blood count checks.
Collection and processing
- Sample type: Serum
- Fasting: No
- Estimated laboratory processing: Results should arrive 4 – 6 business days after the lab receives samples.
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should arrive 4 – 6 business days after the lab receives samples.. Timing can change after collection or if a laboratory requires additional review.
About this test
DetailsClozapine is an antipsychotic medication used primarily to treat schizophrenia in patients who have not responded to other treatments. A Clozapine blood level test measures the amount of the drug in the blood to ensure it is within a therapeutic range and to avoid toxicity. Monitoring is crucial because clozapine can cause serious side effects, including agranulocytosis (a dangerous drop in white blood cells), requiring regular blood count checks.
What type of sample is required for this test?Plasma
Test ResourcesFor more information, please consult your healthcare provider.
Additional details
Clozapine is an antipsychotic medication used primarily to treat schizophrenia in patients who have not responded to other treatments. A Clozapine blood level test measures the amount of the drug in the blood to ensure it is within a therapeutic range and to avoid toxicity. Monitoring is crucial because clozapine can cause serious side effects, including agranulocytosis (a dangerous drop in white blood cells), requiring regular blood count checks.
Highlighted health areas
- Neurological
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Clozapine
- Norclozapine