# Review the trend after metolazone is added to furosemide and select the best interpretation and action.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=522759&lang=en  
> language: en  
> subject: Adverse Effects/Contraindications/Interactions  
> category: PPT

## Question

Review the trend after metolazone is added to furosemide and select the best interpretation and action.

| Time | Data |
| --- | --- |
| Before combination | Weight 82.0 kg; BP 118/70 mm Hg; sodium 138 mEq/L; potassium 4.1 mEq/L; creatinine 1.2 mg/dL |
| Twenty-four hours | Weight 79.8 kg; BP 100/62 mm Hg; sodium 132 mEq/L; potassium 3.4 mEq/L; urine output brisk |
| Current | Weight 77.3 kg; BP 86/52 mm Hg; sodium 126 mEq/L; potassium 2.8 mEq/L; bicarbonate 35 mEq/L; creatinine 2.0 mg/dL; urine output falling |

Q1. How should the trend be interpreted?

Safe decongestion with stable kidney function
Excessive diuresis with volume, electrolyte, and prerenal kidney injury
Expected sodium retention from metolazone

Q2. Which action is appropriate?

Hold the diuretic combination as authorized, notify the team, and obtain immediate volume, renal, electrolyte, and rhythm management
Give an extra metolazone dose because urine output is falling
Wait until potassium falls below 2.0 mEq/L

## Explanation

Rapid weight loss with hypotension, oliguria, rising creatinine, hyponatremia, hypokalemia, and elevated bicarbonate indicates excessive diuresis with volume and electrolyte depletion, not therapeutic decongestion alone.

## In-depth explanation

Quick answer
Distinguish desired decongestion from excessive sequential-nephron diuresis.

Why this is correct
Metolazone can markedly amplify furosemide. The combination may produce prolonged fluid and electrolyte loss, prerenal azotemia, and dysrhythmia risk when monitoring and replacement do not keep pace.

Easy analogy or mental picture
Build a medication safety chain: identify the cue cluster, connect it to the drug mechanism, stop preventable exposure, stabilize the client, and verify the response with measurable findings.

Memory hook
Cue cluster, medication mechanism, protective action, and measurable reassessment.

NCLEX decision rule
Choose the action that prevents the most immediate medication-related harm while preserving treatment for the underlying condition.

Why the other choices are wrong
Options that rely on one reassuring value, continue a suspect exposure, bypass monitoring, or delay escalation leave the medication hazard active.References
1DailyMed: Metolazone prescribing informationLarge fluid and electrolyte losses with furosemide, hyponatremia, hypokalemia, alkalosis, hypotension, and prerenal azotemia

## Clinical scenario

Medication-safety review
Verify the indication, current assessment, laboratory trend, timing, route, interactions, authorized action, and measurable follow-up.

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