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What causes dark coloured urine after taking Metronidazole?

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Posted on Fri, 7 Mar 2014
Question: i started metronidazole on 14 Feb 2014 following dental extraction and have been prescribed this for a 5 day course. my urine is now very dark but otherwise feel very well, i am not taking any other medication. please can you advise
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Answered by Dr. Michelle Gibson James (15 minutes later)
Brief Answer: side effect of metronidazole Detailed Answer: HI, thanks for using healthcare magic Metronidazole is one of the medications that can cause urine to become dark or brown in colour. It is one of at least 12 medications known to have this effect.Some other examples of chloroquine,primaquine, levadopa, nitrofuratoin. This does not reflect kidney damage and the colour returns to normal once the medication course is completed. Once you have finished the course of metronidazole, your urine colour will return to its original state. I hope this helps, feel free to ask any other questions
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Michelle Gibson James (1 minute later)
thank you so much for your speedy and reassuring response best wishes XXXX
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Answered by Dr. Michelle Gibson James (8 minutes later)
Brief Answer: your are welcome Detailed Answer: feel free to contact at any time with any additional queries
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Dr. Michelle Gibson James

General & Family Physician

Practicing since :2001

Answered : 16811 Questions

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What causes dark coloured urine after taking Metronidazole?

Brief Answer: side effect of metronidazole Detailed Answer: HI, thanks for using healthcare magic Metronidazole is one of the medications that can cause urine to become dark or brown in colour. It is one of at least 12 medications known to have this effect.Some other examples of chloroquine,primaquine, levadopa, nitrofuratoin. This does not reflect kidney damage and the colour returns to normal once the medication course is completed. Once you have finished the course of metronidazole, your urine colour will return to its original state. I hope this helps, feel free to ask any other questions