A 58-year-old man who has recently travelled oversees presents with lethargy, weight loss and mild breathlessness. | Medibuddy
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27th February 2024

A 58-year-old man who has recently travelled oversees presents with lethargy, weight loss and mild breathlessness.

A 58-year-old man who has recently travelled oversees presents with lethargy, weight loss and mild breathlessness. Investigations confirm a diagnosis of TB and so he is started on RIPE regimen. After a few days, the patient returns with complaint of reddish body fluids such as urine and saliva. His medications are as follows:

DATE DRUG NAME DOSE ROUTE FREQUENCY Prescriber’s Signature
10/1/21 RIFAMPICIN 500MG ORAL ONCE DAILY DR
10/1/21 ISONIAZID 40MG ORAL ONCE DAILY DR
10/1/21 PYRAZINAMIDE 500MG ORAL THRICE DAILY DR
10/1/21 ETHAMBUTOL 500MG ORAL PRN DR
10/1/21 PARACETAMOL 500MG ORAL PRN DR
10/1/21 OMEPRAZOLE 20MG ORAL ONCE DAILY DR

Select the single most likely drug that has caused the discolouration of his body fluids.

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