Which antipsychotics have reported associations with thrombocytopenia?

Which antipsychotics have reported associations with thrombocytopenia?

• A. Asenapine, clozapine, olanzapine, quetiapine, risperidone, ziprasidone
• B. Clozapine only
• C. Haloperidol and chlorpromazine
• D. Aripiprazole and lurasidone

Answer: (A)

Thrombocytopenia can be a rare adverse effect of several antipsychotics, reflecting idiosyncratic or immune-mediated destruction of platelets. Among these medications, multiple second-generation (atypical) antipsychotics have documented reports of thrombocytopenia, including asenapine, clozapine, olanzapine, quetiapine, risperidone, and ziprasidone. This breadth is why this set is the best answer: it captures the class-wide potential for this hematologic reaction, based on clinical reports and pharmacovigilance data. In practice, if a patient on these drugs develops signs of bleeding or petechiae, or has unexpectedly low platelets on a CBC, clinicians should evaluate the platelets and consider the antipsychotic as a contributing factor, balancing risks and benefits and monitoring accordingly. Clozapine, in particular, is well known for hematologic risks and requires regular monitoring for neutropenia, while other antipsychotics may present thrombocytopenia less predictably but have documented associations.

Thrombocytopenia can be a rare adverse effect of several antipsychotics, reflecting idiosyncratic or immune-mediated destruction of platelets. Among these medications, multiple second-generation (atypical) antipsychotics have documented reports of thrombocytopenia, including asenapine, clozapine, olanzapine, quetiapine, risperidone, and ziprasidone. This breadth is why this set is the best answer: it captures the class-wide potential for this hematologic reaction, based on clinical reports and pharmacovigilance data.

In practice, if a patient on these drugs develops signs of bleeding or petechiae, or has unexpectedly low platelets on a CBC, clinicians should evaluate the platelets and consider the antipsychotic as a contributing factor, balancing risks and benefits and monitoring accordingly. Clozapine, in particular, is well known for hematologic risks and requires regular monitoring for neutropenia, while other antipsychotics may present thrombocytopenia less predictably but have documented associations.