Clozapine therapy requires monitoring of which laboratory value due to effects on blood cells?

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Multiple Choice

Clozapine therapy requires monitoring of which laboratory value due to effects on blood cells?

Clozapine can cause serious suppression of white blood cells, especially neutrophils, which leads to agranulocytosis. Because this drug’s hematologic toxicity is a drop in white blood cells, monitoring the white blood cell count is essential to catch dangerous declines early and prevent infection. The other labs aren’t specifically tied to clozapine’s blood cell effects: monocyte count isn’t the primary concern with this risk, ESR is a nonspecific inflammatory marker, and creatinine clearance reflects kidney function rather than blood cell status. In practice, tracking white blood cell count (and often absolute neutrophil count) guides safety decisions for continuing or holding therapy.

Clozapine can cause serious suppression of white blood cells, especially neutrophils, which leads to agranulocytosis. Because this drug’s hematologic toxicity is a drop in white blood cells, monitoring the white blood cell count is essential to catch dangerous declines early and prevent infection. The other labs aren’t specifically tied to clozapine’s blood cell effects: monocyte count isn’t the primary concern with this risk, ESR is a nonspecific inflammatory marker, and creatinine clearance reflects kidney function rather than blood cell status. In practice, tracking white blood cell count (and often absolute neutrophil count) guides safety decisions for continuing or holding therapy.

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