What is the priority nursing intervention when caring for a patient after an overdose of amphetamines?

Choice A rationale Directing a patient toward intellectual activities is contraindicated during the acute phase of amphetamine toxicity. These substances induce a profound catecholamine release, leading to significant central nervous system overstimulation and cognitive fragmentation. Forcing mental concentration can exacerbate agitation, trigger psychotic symptoms, or increase the risk of seizures. Nursing care must instead focus on environmental triggers and sensory reduction to facilitate neurochemical stabilization and prevent further behavioral escalation or physical exhaustion in the recovering patient. Choice B rationale Monitoring vital signs is the priority because amphetamines are potent sympathomimetics that stimulate alpha and beta-adrenergic receptors. This stimulation frequently leads to life-threatening complications such as malignant hypertension, tachycardia, and hyperthermia. Systematic assessment allows for the early detection of cardiac arrhythmias or hypertensive crises. The normal heart rate range is 60 to 100 beats per minute, and blood pressure should stay below 120/80 mmHg. Continuous observation ensures immediate intervention for hemodynamic instability or respiratory distress. Choice C rationale Using warmers is dangerous because amphetamine overdose typically causes significant hyperthermia rather than hypothermia. The drug increases metabolic rate and physical activity while interfering with the hypothalamus's thermoregulatory capabilities. Elevated body temperatures can lead to rhabdomyolysis, organ failure, and brain damage. Nurses should implement cooling measures, such as tepid baths or cooling blankets, if the temperature exceeds the normal range of 36.5 to 37.5 degrees Celsius, rather than introducing external heat sources. Choice D rationale While depression is a common feature of the crash phase following amphetamine use, it is not the immediate priority during the acute overdose period. Acute physiological instability takes precedence over psychological assessment. Once the patient is medically stable and the stimulant effects have subsided, the nurse must then monitor for the depletion of dopamine and norepinephrine, which leads to severe dysphoria and potential suicidal ideation. This intervention is critical for long-term safety but follows physiological stabilization.