Stage 1 — Recognize cues. The nurse assesses the client at 0400. Highlight the findings that require immediate follow-up.

Quick answer
Select reduced arousal, even resistance to passive movement, temperature 40.2 C, and the blood pressure swing from 176/102 to 88/50.

Why this is correct
After rapid dose escalation of a high-potency dopamine antagonist, the combination of altered consciousness, lead-pipe rigidity, hyperthermia, and autonomic lability is a medical emergency. The rigidity is described as uniform resistance through the range, which is the lead-pipe pattern rather than clonus. The blood pressure trend, not a single value, shows autonomic instability.

Easy analogy or mental picture
Imagine a thermostat and a brake both failing at once: temperature climbs, muscles lock, and blood pressure swings because the dopamine signal that regulates all three has been blocked.

Memory hook
NMS is slow and stiff (lead-pipe, days); serotonin syndrome is fast and twitchy (clonus, hours).

NCLEX decision rule
When a client on an antipsychotic develops fever, first compare the motor pattern and exposure history: uniform rigidity with dopamine-blocker exposure points to NMS; clonus with serotonergic exposure points to serotonin syndrome; anesthetic exposure points to malignant hyperthermia.

Why the other choices are wrong
No clonus and pupils 4 mm and reactive are tempting because they are neuromuscular and eye findings, but they are the negative findings that separate NMS from serotonin syndrome (clonus, mydriasis). No surgery or anesthesia excludes malignant hyperthermia as the trigger. The neck spasm was acute dystonia that has already resolved with treatment. Shouting and pacing on admission and hearing voices are features of the psychosis being treated, not of the new syndrome. SpO2 95% is acceptable at present.