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. 2008 Dec;4(4):232–237. doi: 10.1007/BF03161206

Proteinuria is unrelated to the extent of acute acetaminophen overdose: A prospective clinical study

Suzanne Benhalim 1, Gillian E Leggett 1, Helen Jamie 1, W Stephen Waring 1,✉
PMCID: PMC3550117  PMID: 19031374

Abstract

Background

Acute renal failure is a recognized complication of acute acetaminophen overdose. Its detection depends on rising creatinine concentrations, which is an insensitive method. The present study examined whether proteinuria might correspond with the extent of acute acetaminophen exposure as a possible early marker of renal effects.

Methods

A prospective case-control study included patients attending the emergency department within 24 hours of acetaminophen ingestion. A urine specimen was collected within 12 hours of hospital attendance for creatinine, albumin, and protein determination. Equivalent 4-hour acetaminophen concentrations were used to indicate drug exposure: mild if <100 g/L (<662 mmol/L), moderate if 100–200 g/L (662–1323 mmol/L), or severe if > 200 g/L (> 1323 mmol/L). Data are presented as median interquartile range) and groups compared using Mann Whitney and chi-square tests.

Results

Seventy patients were studied (17 men, 53 women), age 37 years (23–45 years). The stated acetaminophen dose was 15 g (8–20 g), and interval between ingestion and presentation was 4.6 hours (4.1–7.9 hours). Urinary albumin concentrations were 8 mg/L (0–12 mg/L) in the mild group, 12 mg/L (5–25 mg/L) in the moderate group, and 11 mg/L (6–22 mg/L) in the severe group. Total protein concentrations were 90 mg/L (50–183 mg/L), 70 mg/L (40 to 130 mg/L), and 110 mg/L (75–205 mg/L), respectively. The proportions of patients who had urine albumin:creatinine ratio > 3 mg/mmol were 20.8%, 23.5%, and 21.2%, respectively. None of the patients developed acute renal failure.

Conclusions

No relationship was found between the extent of acute acetaminophen exposure and proteinuria. Further work is required to examine whether urinary protein excretion is altered in patients who subsequently develop acute renal failure following acetaminophen overdose.

Keywords: acetaminophen, albumin:creatinine ratio, creatinine, proteinuria, renal failure

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