A young patient is brought to the emergency ward due to drug overdose of cocaine following intravenous administration. Which among the following symptoms will be noted?

1. A

   Agitation

2. B

   Bradycardia

3. C

   Hyperthermia

4. D

   Euphoria

Appeared in: AIIMS Raipur - 2017 (Shift-3)

Explanation

• Cocaine overdose results in sympathetic nervous system hyperactivity, with hyperthermia (a dangerously high body temperature) being a critical and life-threatening manifestation.
• The mechanism involves a combination of increased heat production from psychomotor agitation, impaired heat dissipation from peripheral vasoconstriction, and disruption of the brain's temperature control center (hypothalamus).
• Medical literature identifies hyperpyrexia (severe hyperthermia) as one of the most common and dangerous acute effects of cocaine toxicity on the central nervous system.

Why Other Options Were Wrong

• Option A: While agitation is a very common symptom of cocaine's stimulant effects, hyperthermia represents a more severe and life-threatening physiological complication that is a hallmark of severe toxicity.
• Option B: This is the opposite of the expected effect. As a potent sympathomimetic stimulant, cocaine consistently causes tachycardia (an abnormally fast heart rate).
• Option D: Euphoria is the initial, desired psychological effect of cocaine. In a severe overdose presenting in an emergency setting, this initial high is typically replaced by negative psychological states like severe agitation, paranoia, anxiety, or psychosis.

Related Visual

• Visual 1: Flowchart: Pathophysiology of Cocaine-Induced Hyperthermia. This visual would illustrate how cocaine's actions (dopamine/norepinephrine reuptake inhibition) lead to psychomotor agitation, vasoconstriction, and hypothalamic dysregulation, all culminating in a dangerous rise in core body temperature.

Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Clinical manifestations of cocaine overdose in acute care settings.
• Nurses in the emergency department must prioritize monitoring core temperature in patients with suspected cocaine overdose, as hyperthermia can rapidly lead to rhabdomyolysis, seizures, and multi-organ failure.
• Immediate nursing interventions include initiating rapid cooling measures (e.g., cooling blankets, ice packs to groin/axilla) and administering benzodiazepines as ordered to control agitation, which is a major contributor to heat production.
• What if the patient had taken an opioid (like heroin) instead of cocaine? The nurse would expect opposite symptoms: respiratory depression, pinpoint pupils (miosis), bradycardia, and hypothermia, requiring naloxone administration.

How to Approach the Question

• First, identify the drug mentioned in the question: Cocaine.
• Next, classify the drug's action. Cocaine is a potent Central Nervous System (CNS) stimulant and sympathomimetic.
• Recall the classic effects of CNS stimulants, which mimic the 'fight or flight' response: increased heart rate, elevated blood pressure, increased body temperature, and heightened alertness or agitation.
• Evaluate each option against this knowledge: 'Agitation' is consistent. 'Bradycardia' (slow heart rate) is inconsistent; tachycardia is expected. 'Hyperthermia' (high temperature) is consistent and a known severe complication. 'Euphoria' is a known effect but may not be the presenting sign in a severe overdose.
• Compare the valid options. In an emergency overdose scenario, a life-threatening physiological sign like hyperthermia is a more critical and definitive finding than a behavioral symptom like agitation. Therefore, hyperthermia is the best answer.

Concept Tested & Keywords

• Concept Tested: Clinical manifestations of cocaine overdose
• Stem keywords: drug overdose, cocaine, intravenous administration, symptoms
• Lead-in keywords: Which among the following
• Clinical cues: Patient in the emergency ward suggests an acute and severe condition.
• Clinical cues: Intravenous administration leads to rapid onset and high intensity of effects.

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