A random urine sample was received for routine urinalysis from a 62-year-old patient who had undergone multiple surgeries 9 months earlier to treat metastatic bladder cancer. The patient was at that time prescribed amlodipine, fosinopril, omeprazole, pravastatin, Prosed™ DS (Ferring Pharmaceuticals), and VESIcare (Astellas Pharma).


  1. What is responsible for the unique color of this urine sample (Fig. 1)?
  2. Will the color interfere with urinalysis?
  3. Could the cause of the color affect other laboratory tests ordered for this patient?

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