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Doctor insights on: How Common Is Dark Urine When Taking Metronidazole

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Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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I'm on metronidazole and noticed dark urine. Should I stop using it?

I'm on metronidazole and noticed dark urine. Should I stop using it?

According to: Drugs.Com "Instances of darkened urine have been investigated. The pigment responsible has not been positively identified; however, it is most likely a metabolite of metronidazole and appears to have no clinical significance." Would not stop - but would advise your prescribing provider. ...Read more

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Can 30mg/day taking for 3days cause dark urine (one episode ) also on metronidazole for vaginitis and now have aches in pelvic area? Help! Worried !

Can 30mg/day taking for 3days cause dark urine (one episode ) also on metronidazole for vaginitis and now have aches in pelvic area? Help! Worried !

Should be ok: nothing i know of would cause the realtionship of dark urine and flagyl or prednisone, should clear up fats if not or urine symptoms get urine culture and drink more water to clear the urine, vaginitis is a yeast /fungul infection and treated by diflucan (fluconazole) usually , vaginosis is a bacterial infection treated by flagyl [can't drink alcohol while on it or get nausea] ...Read more

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I was recently given ceftriaxone (shot), azithromycin (pill) and flagyl (pill) as pre-exposure preventative therapy. Is dark urine a side effect?

I was recently given ceftriaxone (shot), azithromycin (pill) and flagyl (pill) as pre-exposure preventative therapy. Is dark urine a side effect?

Nope: None of these drugs is a likely cause of dark urine; no worries there, but contact the doctor or clinic where you were treated. Obviously you were considered at risk for STDs. These drugs will prevent gonorrhea, chlamydia, syphilis, and trichomonas, but not viral STDs like HIV, herpes, hepatitis B, and HPV. Be sure to follow up as directed by the doctor or clinic. Good luck! ...Read more

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Does metronidazole 500mg tabs cause dark urine (redish/brownish/yellowish) and diarrhea? And is it normal or I should be worried?

Does metronidazole 500mg tabs cause dark urine (redish/brownish/yellowish) and diarrhea? And is it normal or I should be worried?

Yes, metronidazole: Can cause ur symptoms. Eating apples and bananas should relieve ur diarrhea. Follow up with ur dr for any concerns. Take care and god bless u! ...Read more

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What are the common causes for dark urine / blood in the urine?

What are the common causes for dark urine / blood in the urine?

Many things: Infection, increased bilirubin (which can be from a liver problem or blood destruction). There is a rare disorder called paroxsymal nocturnal hemoglobinuria. Could be bleeding from the kidney. The most common would be an infection. ...Read more

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Does metronidazole pills make your urine dark?

Does metronidazole pills make your urine dark?

Yes it can: Flagyl (metronidazole) can cause a darkening of urine. This is generally a harmless effect when taking the medication. ...Read more

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Started taking metronidazole yesterday. Used the bathroom & urine was dark yellow & I had a clumpy white discharge that wasn't present before.

Started taking metronidazole yesterday. Used the bathroom & urine was dark yellow & I had a clumpy white discharge that wasn't present before.

Vaginal discharge: If you were prescribed metronidazole for a vaginal infection (trichomonas or bacterial vaginosis), you'rr probblly seeing discharge from that infection. Symptoms can persist and even get for a couple days after starting treatment, so wait a few days and see what happens. But if in doubt, contact the doctor/clinic treating you. ...Read more

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What exactly does dark urine mean?

Dark urine: Dark urine can mean many things. The main concern is blood in urine will create a dark "tea-colored" urine. I recommend that you see your doctor and have a urinalysis along with a culture as soon as possible. www.peedoc.com @drhtay. ...Read more

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What does it mean if you have super dark urine?

What does it mean if you have super dark urine?

Dark urine: Common causes of dark urine are bilirubin, blood, hydration status. www.peedoc.com @drhtay. ...Read more

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What is the definition or description of: Dark urine?

Dark urine: Urine tends to be golden yellow from uric acid excretion. Brown or red suggests hemolysis, i.e. dark urine. Many causes, from trauma, infection, neoplasia, etc. We should all strive for crystal clear urine. Drink plenty of H2O! ...Read more

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I"ve had dark urine that sinks to bottom of toilet. What could this be?

I"ve had dark urine that sinks to bottom of toilet.  What could this be?

Dehydration: Please drink more water and your issue should resolve itself otherwise see your health care provider. ...Read more

Dr. Sewa Legha
228 doctors shared insights

Dark Urine (Definition)

Urine tends to be golden yellow from uric acid excretion. Brown or red suggests hemolysis, i.e. dark urine. Many causes, from trauma, infection, neoplasia, etc. We should all strive for crystal clear urine. ...Read more


Dr. Anthony Sharber
988 doctors shared insights

Metronidazole (Definition)

It's an antibiotic used to treat infections such as bacterial vaginosis or a type of ...Read more