A patient diagnosed with major depression has lost 9 kilograms in one month, has chronic low self-esteem, and a plan for suicide. The patient has taken an antidepressant medication for 1 week. Which nursing intervention has the highest priority?

Choice A reason: The presence of a specific suicide plan in a patient with major depression constitutes a psychiatric emergency. Safety is always the highest priority in the hierarchy of needs. The nurse must establish 1:1 observation or suicide or constant visual monitoring to prevent self-harm, as the patient’s intent and plan indicate an immediate threat to life. Choice B reason: While group therapy is an effective evidence-based intervention for addressing chronic low self-esteem and social isolation in depressed patients, it is not a priority during an acute suicidal crisis. The patient must be stabilized and safe before they can meaningfully participate in or benefit from the interpersonal dynamics of a therapeutic group setting. Choice C reason: Observing for therapeutic effects is important, but antidepressants typically require 2 to 4 weeks to show significant clinical improvement. At 1 week, the patient remains highly symptomatic and may even experience a "wash-in" period where energy increases slightly while suicidal ideation remains high, actually increasing the immediate risk of a suicide attempt. Choice D reason: A weight loss of 9 kilograms in 1 month is significant and requires nutritional intervention like high-calorie snacks. However, nutritional status is secondary to immediate physical safety. Physical survival from a suicide attempt takes precedence over correcting nutritional deficits, although both will eventually be addressed in the comprehensive multidisciplinary plan of care.