Mental Health · NGN Unfolding Case Study

Acetaminophen Overdose: NAC Treatment

6 linked questionsAll 6 CJMM layersApril 2026 NCLEX test plan

Clinical Scenario

Emily Chen is a 19-year-old female brought to the ED by her roommate after she found Emily crying and confessing to ingesting 'all her Tylenol' approximately 6 hours ago. She has no prior psychiatric history. She is tearful but cooperative. She ingested 50 tablets of 500 mg acetaminophen (Tylenol) w

What You'll Practice

This NGN unfolding case study walks you through 6 linked clinical-judgment questions covering the full NCSBN Clinical Judgment Measurement Model. Each question is mapped to a specific cognitive layer; together they take you from recognizing the first cue at the bedside through evaluating whether your interventions worked.

CJMM cognitive layers in this case

The 6 questions in this Mental Health case test 3 of the 6 CJMM cognitive layers. Knowing which layer a question targets is half the battle — it tells you what mental move the question is rewarding (recognition vs. prioritization vs. action vs. evaluation).

  • Generate SolutionsBrainstorm appropriate nursing interventions
  • Take ActionExecute the highest-priority intervention first
  • Evaluate OutcomesReassess whether the intervention worked

NGN question formats in this case

The April 2026 NCSBN test plan rewards practice across multiple NGN item types. This case includes:

4× multiple-response-select-n1× Trend

Each format scores differently — bow-tie centers are all-or-nothing, matrix and cloze use partial-credit per row/blank, extended response is polytomous. Practicing the formats together builds the format fluency the exam rewards. See our NGN guide for the scoring breakdown of each.

Sample question from this case

Here's the prompt for the first question in this case — read it once, then think about what you would assess first. (Answer choices and rationale unlock with $29 access.)

"A 19-year-old female presents to the ED 6 hours after intentionally ingesting 25g of acetaminophen (50 tablets of 500 mg). Her acetaminophen level is 180 mcg/mL at 6 hours post-ingestion — above the Rumack-Matthew nomogram treatment line. AST 42 (mildly elevated), INR 1.1, creatinine 0.7. Which intervention should be i"

Clinical topics covered

This case study touches on the following clinical concept areas:

gastrointestinalrenalendocrinehematology

Why this Mental Health case matters for the NCLEX

Mental Health content represents a meaningful share of the NCSBN April 2026 test plan, and unfolding case studies in this category test exactly the kind of bedside reasoning the exam was redesigned to measure. Working through this case builds the recognize-analyze-prioritize-act sequence you'll use on test day — and on every floor you ever work.

The single biggest predictor of NGN performance isn't memorization — it's pattern recognition built from doing many full case studies under realistic time pressure. Reading this scenario, predicting the first nursing action before answering, and reviewing the rationale afterward is the loop that wires the reasoning skill into your head.

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About NCLEX PrePro NGN Case Studies

NCLEX PrePro hosts 330 NGN unfolding clinical case studies alongside 6,000+ NGN-style practice questions across 15 categories — fully aligned with the April 2026 NCSBN test plan. Every case is reviewed against the Clinical Judgment Measurement Model. Learn how to study NGN clinical-judgment questions →

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