A nurse is caring for a client who has a new diagnosis of major depressive disorder. Which of the following medications should the nurse expect the provider to prescribe to the client as a first-line treatment?

Choice A reason: Midazolam is a benzodiazepine used primarily for sedation, anxiety relief, and anesthesia. It is not used as a first-line treatment for major depressive disorder. Choice B reason: Fluoxetine is a selective serotonin reuptake inhibitor (SSRI) commonly prescribed as a first-line treatment for major depressive disorder. SSRIs work by increasing the levels of serotonin in the brain, which can help improve mood and alleviate depressive symptoms. Choice C reason: Cyclobenzaprine is a muscle relaxant used to relieve muscle spasms. It is not indicated for the treatment of major depressive disorder. Choice D reason: Valproic acid is primarily used as a mood stabilizer and anticonvulsant. It is not typically used as a first-line treatment for major depressive disorder, although it may be used in cases of bipolar disorder.