After medication administration, which client should the LPN initially follow up on?

The client who received fluphenazine and reports fever should be the initial priority for follow-up. Fluphenazine is an antipsychotic medication that can be associated with serious side effects, including neuroleptic malignant syndrome (NMS), which can present with hyperthermia (fever), muscle rigidity, and autonomic instability. A report of fever in this context raises immediate concern as it could indicate a life-threatening condition requiring prompt assessment and intervention.

In contrast, while sleepiness and dizziness are valid concerns after the administration of mirtazapine and clonidine respectively, these symptoms are generally less urgent. Nausea following citalopram administration also requires attention, but it is not as critical as the potential complications associated with fever in a patient receiving fluphenazine. Therefore, the client with the fever requires the most immediate follow-up to ensure their safety and to address any potential complications swiftly.