Abnormally colored urine
(Redirected from Urine discoloration)
Background
The urine can help guide the toxicologic differential in a poisoned patient[1]
Clinical Features
- Complaint of abnormally colored urine
Differential Diagnosis
Red Urine
- Hematuria
- Hemoglobinuria
- Porphyria
- Myoglobinuria (rhabdomyolysis)
- Foods
- Blackberries
- Beets
- Blackberries
- Rhubarb
- Food coloring
- Fava beans
- Drugs
- Uric acid crystalluria (neonates)
Black
- Methyldopa
- Betadine
- Melanoma
- Cresol
- Iiron
- Laxatives (cascara, senna)
- L-dopa
- Methocarbamol
- Metronidazole
- Nitrofurantoin
- Sorbitol
Orange
- Pyridium
- Rifampin
- Vitamin A
- Vitamin B12
- Carrots
- Beets
- Bile pigments
- Uric acid crystalluria (neonates)
Purple
Brown
- Levodopa
- Metronidazole
- Nitrofurantoin
- Iron sorbitol
- Chloroquine
- Methyldopa
- Acetaminophen (overdose)
- Niridazole
- Fava beans
- Rhubarb
Blue/Green
- Amitryptiline
- Indomethicin
- Pseudomonas
- Methylene blue
- Clorets breath mints
- Cimetidine
- Flupirtine
- Methocarbamol
- Metoclopramide
- Promethazine
- Propofol
- Tetrahydronaphthalene
- Zaleplon
Evaluation
Hematuria vs Myoglobinuria
Urine from a person with rhabdomyolysis showing the characteristic brown discoloration as a result of myoglobinuria
- Hematuria
- Urinalysis = +Blood with +RBCs
- Myoglobinuria
- Urinalysis = +Blood with -RBCs
Management
- Dependent on diagnosis
Disposition
- Dependent on diagnosis