The nurse is providing care to a client in the clinic who is newly diagnosed with generalized anxiety disorder. Which of the following is the first-choice medication for a client with anxiety?

Choice A reason: Propranolol, a beta-blocker, reduces physical anxiety symptoms (e.g., tachycardia) by blocking adrenaline’s effects on beta receptors. It is not first-line for generalized anxiety disorder, as it addresses somatic symptoms rather than the underlying neurochemical imbalance, such as serotonin dysregulation, targeted by more effective long-term treatments. Choice B reason: Hydroxyzine, an antihistamine, has sedative properties and is used for acute anxiety by modulating histamine and serotonin receptors. It is not first-line for generalized anxiety disorder, as it lacks long-term efficacy and primarily addresses short-term symptoms, unlike treatments targeting chronic serotonin imbalances. Choice C reason: Fluoxetine, a selective serotonin reuptake inhibitor (SSRI), is the first-choice medication for generalized anxiety disorder. It increases serotonin levels in the brain, stabilizing mood and reducing excessive worry by enhancing neurotransmission in the prefrontal cortex and amygdala, offering long-term efficacy with fewer dependency risks compared to benzodiazepines. Choice D reason: Alprazolam, a benzodiazepine, enhances GABA activity for rapid anxiety relief but is not first-line due to high dependence risk and short-term effects. Generalized anxiety disorder requires long-term management, and SSRIs like fluoxetine are preferred for their efficacy in addressing chronic serotonin dysregulation without addiction potential.