A nurse is assessing a client with post-traumatic stress disorder (PTSD) who reports nightmares. Which of the following medications should the nurse expect the provider to prescribe?

Choice A reason: Fluoxetine, an SSRI, treats PTSD’s depressive and anxiety symptoms by increasing serotonin levels, but it is less effective for nightmares. Nightmares in PTSD are linked to noradrenergic hyperactivity, which fluoxetine does not directly target, making it less specific for this symptom compared to prazosin. Choice B reason: Prazosin, an alpha-1 adrenergic blocker, reduces nightmares in PTSD by decreasing norepinephrine-mediated hyperarousal in the locus coeruleus. This mitigates trauma-related sleep disturbances, a core symptom, improving sleep quality and reducing distress, making it the expected medication for this specific PTSD manifestation. Choice C reason: Haloperidol, an antipsychotic, is not indicated for PTSD nightmares. It targets dopamine receptors to manage psychosis, not the noradrenergic-driven sleep disturbances in PTSD. Its use risks extrapyramidal side effects, making it inappropriate for addressing nightmares in this context. Choice D reason: Diazepam, a benzodiazepine, may reduce anxiety but is not recommended for PTSD nightmares due to dependence risk and lack of specificity for noradrenergic hyperactivity. It sedates without addressing trauma-specific sleep disturbances, making it less effective than prazosin for this symptom.