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​Symptoms and Signs – Differential Diagnosis of Red Urine
WITH A POSITIVE DIPSTICK
• Hematuria
• Hemoglobinuria: negative urinalysis
• Myoglobinuria: negative urinalysis
WITH A NEGATIVE DIPSTICK
Drugs
• Aminosalicylic acid
• Deferoxamine mesylate
• Ibuprofen
• Phenacetin
• Phenolphthalein
• Phensuximide
• Rifampin
• Anthraquinone laxatives
• Doxorubicin
• Methyldopa
• Phenazopyridine
• Phenothiazine
• Phenytoin
Dyes
• Azo dyes
• Eosin
Foods
• Beets, berries, maize
• Rhodamine B
Metabolic
• Porphyrins
• Serratia marcescens (red diaper syndrome)
• Urate crystalluria
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