Which statement best describes the incidence of agranulocytosis with clozapine compared with other antipsychotics?

Which statement best describes the incidence of agranulocytosis with clozapine compared with other antipsychotics?

• A. Clozapine has about 1% agranulocytosis incidence; other antipsychotics are rare
• B. All antipsychotics have similar risk
• C. Clozapine has no increased risk
• D. Clozapine has about 0.01% incidence

Answer: (A)

Clozapine carries a higher risk of agranulocytosis than other antipsychotics, which is why it requires regular blood monitoring. In many studies, the incidence with clozapine is around 0.5–1% (often summarized as about 1%), while agranulocytosis is rare with other antipsychotics. That makes the statement describing about 1% incidence for clozapine and rarity with the others the best description. The other options either imply no increased risk, equal risk across drugs, or give an implausibly low percentage like 0.01%, which doesn’t align with the known safety profile of clozapine.

Clozapine carries a higher risk of agranulocytosis than other antipsychotics, which is why it requires regular blood monitoring. In many studies, the incidence with clozapine is around 0.5–1% (often summarized as about 1%), while agranulocytosis is rare with other antipsychotics. That makes the statement describing about 1% incidence for clozapine and rarity with the others the best description. The other options either imply no increased risk, equal risk across drugs, or give an implausibly low percentage like 0.01%, which doesn’t align with the known safety profile of clozapine.