Dark Urine From Antibiotics: Causes and What to Do
Nitrofurantoin, metronidazole, and rifampin can turn urine brown, red-orange, or dark. See which antibiotics cause it and when to call your doctor.
Dark Urine (Symptom)
4 source-based articles maintained by the HealthRX.com Editorial Team.
4articles
2topic areas covered
May 27, 2026latest review
Dark Urine (Symptom) library
Showing 4 of 4 clinical reviews.
Dark Urine: Labs, Causes, and Next Steps
Dark urine can signal dehydration, liver disease, hemolysis, or medication effects. Learn which lab tests to order, what results mean, and when to seek urgent care.
Dark Urine: What Could Be Causing It
A differential diagnosis guide to dark urine covering dehydration, liver disease, rhabdomyolysis, hematuria, medications, and rare metabolic causes, with clinical red flags and next steps.
Dark Urine: When to See a Doctor
Dark urine can signal dehydration, liver disease, rhabdomyolysis, or blood in the urine. Learn what causes dark urine, how it is diagnosed, and when to seek medical attention.
