A nurse is caring for a client who has a history of cardiac arrhythmias and is taking verapamil. For which of the following reasons should the nurse consult the pharmacist?

A. Consulting the pharmacist is crucial to assess potential drug interactions between verapamil and newly ordered medications. Verapamil can potentiate the effects of other medications that affect cardiac conduction or blood pressure, leading to adverse effects or therapeutic failure if not managed properly.B. While reporting client refusal is important for care coordination, it typically does not require immediate consultation with a pharmacist unless there are specific concerns about managing the client's refusal or exploring alternative treatment options.C. Requesting a change in verapamil dosage should involve clinical assessment and may require collaboration with the healthcare provider to adjust therapy based on the client's response, side effects, or changes in clinical status. This decision typically involves the prescriber rather than the pharmacist.D. Verifying the frequency of administration is important to ensure adherence to the prescribed regimen and optimize therapeutic outcomes. While this information can often be verified through standard references or electronic records, consulting the pharmacist may be necessary for specific clarification or if there are discrepancies.