Which of the following medications is indicated for PTSD-related nightmares?

Prazosin is indicated for treating PTSD-related nightmares due to its ability to block alpha-1 adrenergic receptors, which can help reduce the occurrence and intensity of distressing dreams that are often associated with post-traumatic stress disorder. By dampening the sympathetic nervous system activity during sleep, prazosin effectively alleviates nightmares, a common symptom in individuals suffering from PTSD.

Other medications listed may be used to manage PTSD symptoms or anxiety, but they are not specifically indicated for the treatment of nightmares. For example, sertraline and citalopram are selective serotonin reuptake inhibitors (SSRIs) commonly used as first-line treatments for the overall anxiety and mood symptoms experienced in PTSD, but they do not have a specific indication for nightmares. Similarly, buspirone is primarily an anxiolytic used to treat generalized anxiety disorder, and it does not have evidence supporting its effectiveness in reducing PTSD-related nightmares.