Last updated: Wednesday, 24, November, 2010
|Key Information||Appropriate Tests|
Nature of substance may be clear from clinical assessment, including diet and drug history.
Urinalysis is positive (for blood) in haematuria, haemoglobinuria and myoglobinuria.
Food, food dyes, drugs, including
|History of ingestion of relevant foods, drugs. Colour change with addition of acid/alkali to urine.|
|Exclude haematuria by urine microscopy. Haemoglobin - urine, haemosiderin.|
|Myoglobin - urine.|
|Red colour may appear only if urine is left standing.|
|Urine may darken only if left standing.|
|Urine darkens if left standing. Homogenistic acid - urine.|