MCQ Detailed View

Some medicines can cause changes in the color of urine, which is an important point to know in biology and medicine. Among the given options, the medicine that can turn urine red or orange in color is Rifampicin.

Rifampicin is a powerful antibiotic that is commonly used in the treatment of tuberculosis (TB) and sometimes for other bacterial infections like leprosy. When a patient takes Rifampicin, the drug and its breakdown products are excreted through urine, sweat, tears, and saliva. These substances give body fluids a distinct red or orange color. This side effect is completely harmless, but it can sometimes surprise patients if they are not informed about it.

The other medicines listed do not usually cause red urine:

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  Isoniazid is also used for TB treatment but it does not turn urine red.

  
  


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  Iron capsules may cause dark stool but they do not change urine color.

  
  


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  Omeprazole is used to reduce stomach acid in conditions like ulcers and reflux; it also does not cause red urine.

  
  

It is important for patients to know about this harmless effect of Rifampicin so they do not confuse it with blood in the urine. Red or orange urine caused by Rifampicin is simply due to the way the medicine is processed by the body and passed out through fluids.

Doctors usually advise patients beforehand about this expected change, especially during long courses of treatment for tuberculosis. Being aware of such side effects helps patients remain consistent with their treatment without unnecessary fear.

In summary, Rifampicin is the medicine that makes urine red or orange in color. This is a normal effect and not a sign of disease.