Which laboratory study is likely prescribed for a client taking risperidone (Risperdal)?

Risperidone is an atypical antipsychotic often prescribed for conditions such as schizophrenia and bipolar disorder. One of the concerns when administering risperidone is the potential for hematological side effects, particularly effects on white blood cell and platelet counts. This side effect profile necessitates monitoring the platelet count, as atypical antipsychotics can sometimes lead to blood dyscrasias, including thrombocytopenia (low platelet count).

When starting treatment, it’s prudent to monitor platelet counts periodically, especially in clients who may present additional risk factors for hematological issues. Thus, ordering a platelet count is a relevant and necessary laboratory study for clients taking risperidone.

The other laboratory studies listed, while useful in certain contexts, are not specifically indicated for monitoring the potential side effects associated with risperidone. Liver enzyme tests are more pertinent when watching for signs of hepatotoxicity common with different medication classes, whereas B-type natriuretic peptide is useful in assessing heart failure. Thyroid function tests, while important for assessing endocrine function, do not specifically relate to the risks associated with risperidone treatment.