Relation of Blood Counts during Clozapine Treatment to Serum Concentrations of Clozapine and Nor-Clozapine
Bibliographic record
Abstract
OBJECTIVE: To determine the relation between serum clozapine and nor-clozapine levels and blood cell counts during clozapine treatment. METHOD: We undertook a prospective longitudinal study of 37 consecutive patients with a diagnosis of schizophrenia treated with clozapine. We obtained informed consent and then determined serum concentrations of clozapine and nor-clozapine weekly. Clozapine was administered daily in divided doses given every 12 hours and adjusted according to clinical guidelines for its use. Samples for serum concentrations were taken at steady state, immediately before the next morning's dose, for 4 to 8 weeks. Complete blood counts (CBC), weight, and vital signs (that is, blood pressure, pulse, and temperature) were also monitored weekly before the morning's dose of clozapine was administered. RESULTS: Analyses of variance showed no significant changes over the 8-week treatment course in the observed mean white blood count (WBC), red blood count (RBC), neutrophils, and lymphocytes counts, or in the hemoglobin and hematocrit. Only a few weak correlations (r < 0.21) were found between these hematological parameters and the measures of serum clozapine and nor-clozapine. CONCLUSIONS: The mechanism of clozapine-induced hematotoxicity at the therapeutic dosage range is probably not by direct toxicity of clozapine or nor-clozapine to the blood cells or their precursors. The formation of the cytotoxic nitrenium compound from clozapine by neutrophils may be necessary.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".