Mr Z went to his GP when he noticed that his morning urine was a bright orange colour. He recently saw another doctor with a persistent cough, weight loss and night sweats. She took X-rays and said to him that she would get back to him with the results.
This doctor e-mailed him a script for medication, which he started taking the night before. Unfortunately Mr Z can't remember the name of his new medication.
He has no other medical history, has never had any surgeries, and has no allergies.
While waiting in his GP's office, Mr Z googled the possible causes of his orange urine. He came across a possible cause.
Based on the above information:
1. What is the most likely cause of his bright orange urine?
2. Should Mr Z be worried?
3. Is there any information the (first) doctor should have given him?
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