Causes of Discoloured Urine

Patients frequently complain of discoloured urine. The table below lists common causes of urine discolouration that are often seen in practice.

Table 2: Causes of discoloured urine

Colour Cause
Dark Yellow
  • Drugs: chloroquine and sulphonamides
  • Bilirubin
  • Foods: carrots, riboflavin, vitamin A
  • Drugs: phenolphthalein laxatives, rifampicin sulfasalazine
Blue Green
  • Pseudomonas
  • Drugs: amitriptyline, NSAIDS, promethazine
Red Brown
  • Sorbitol
  • Porphyria
  • Foods: rhubarb, fava beans
  • Drugs: rifampicin, phenothiazines
  • Foods: beetroot and blackberries
  • Haemoglobinuria
  • Myoglobinuria
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