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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Dark Urine Post Metformin Withdrawal?

I was just diagnosed with Type 2 Diabetes and am taking Metformin. I was taking 4 500 mg. at dinner. After about a week, I vomited twice and stopped taking the Metformin. My urine is darker than usual and I was told I was probably dehydrated. However, it s been 6 days and I m trying to drink 64 ounces of water - that seems to lighten it but it goes back to dark.
Wed, 20 Jun 2018
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General Surgeon 's  Response
Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.

* As per my surgical experience, the Metformin withdrawal is not responsible for the urine darkness.
* There seems to be urinary infection, alterations in sugar levels, urine pH or others which should be checked with a urine microscopy report.

Hope I have answered your query.
Let me know if I can assist you further.
I find this answer helpful
General Surgeon Dr. Anders Mark Christensen's  Response
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.

You should have a urinalysis performed. A dark colored urine may be caused by many things. Dehydration seems likely.

Hope I have answered your query. Let me know if I can assist you further.
I find this answer helpful

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What Causes Dark Urine Post Metformin Withdrawal?

Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. * As per my surgical experience, the Metformin withdrawal is not responsible for the urine darkness. * There seems to be urinary infection, alterations in sugar levels, urine pH or others which should be checked with a urine microscopy report. Hope I have answered your query. Let me know if I can assist you further.