Detection Window for Cocaine Metabolites in Urine

Standard Detection Timeline

• For typical cocaine users, benzoylecgonine is detectable in urine for approximately 24-48 hours after use, though chronic heavy users may test positive for up to 22 days after their last use 1
• Benzoylecgonine has a urinary half-life of 6-8 hours 1
• Standard detection window: 24-48 hours for most users 1
• Detection can extend up to 22 days after last ingestion in individuals using up to 10 g/day 1

Testing Methodology Considerations

• Positive test threshold: benzoylecgonine >300 ng/mL using qualitative immunoassay 1
• This is the most commonly used laboratory method for cocaine detection 1

Clinical Pitfalls to Avoid

• Quantitative methods are more expensive and potentially misleading due to individual variability in cocaine metabolism and excretion 1
• For patients unable to provide history, urine metabolite testing is appropriate, particularly in young patients with chest pain and few cardiac risk factors 1