*Sudden* onset of vertigo that is constant for >24 h is the hallmark of both disorders. - Vestibular neuritis: persistent vertigo, nausea, vomiting, gait instability; auditory testing is normal. - Labyrinthitis: same vertiginous picture plus unilateral hearing loss, tinnitus, or aural fullness. Patients often describe the room “spinning” and may be unable to stand without support. Nausea peaks in the first 48 h and then subsides as central compensation begins. Clinical trajectory check Link new findings to the underlying process and the compensatory response that is succeeding or failing. Reassess objective trends such as perfusion, oxygenation, mental status, pain pattern, labs, and response to time-limited interventions so the next action reflects improvement or deterioration rather than a memorized label. Clinical trajectory check Link new findings to the underlying process and the compensatory response that is succeeding or failing. Reassess objective trends such as perfusion, oxygenation, mental status, pain pattern, labs, and response to time-limited interventions so the next action reflects improvement or deterioration rather than a memorized label. For NCLEX-RN (Canada), items rarely announce the topic in the first sentence....