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Doctor insights on: Coumadin Harm Kidneys

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Does Coumadin (warfarin) harm your kidneys?

Does Coumadin (warfarin) harm your kidneys?

Indirectly: Coumadin (warfarin) will inhibit clotting factors, which prevent you from bleeding. Blood vessels are always leaking, and low levels of clotting is always happening. If you got bumped or hit in the sides, or a traumatic insult happened to the kidney, Coumadin (warfarin) would keep the vessels from clotting immediately, allowing bleeding and damage to the functional parts of the kidney. ...Read more

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Kidney (Definition)

The kidneys are paired organs that lie on either side of the vertebral column. Part of their critical functions include the excretion of urine and removal of nitrogenous wastes products from the blood. They regulate acid-base, electrolyte, fluid balance and blood pressure. Through hormonal signals, the kidneys control the ...Read more


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Can an overdose caused by taking to much Coumadin (warfarin) cause some kidney damage?

Can an overdose caused by taking to much Coumadin (warfarin) cause some kidney damage?

Rarely: The biggest problem with an overdose of Coumadin (warfarin) is the blood being too thin and you being at high risk for bleeding. There are a few cases (rarely) where patients have had hemorrhage (bleeding) in their kidneys from high Coumadin (warfarin) levels causing kidney damage. ...Read more

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91 year old male with pain on left side about hip level but towards the back. No blood in urine. Could this be a kidney stone on Coumadin and flomax (tamsulosin). He has a huge protate and does not hydrate enough.

91 year old male with pain on left side about hip level but towards the back.  No blood in urine.  Could this be a kidney stone on Coumadin and flomax (tamsulosin).  He has a huge protate and does not hydrate enough.

Here are some ...: Clinically, I agree with my colleague stating musculoskeletal origin as a culprit for pain as described. For a 91-year-old man, bring the detailed info on his voiding history and pain near left hip & lower back stressing their quality, quantity, and sequence of events over time to Doc for analysis, physical exam, & tests such as residual urine, urinalysis, renal function, etc. so to define cause ...Read more

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I've just started warfarin and have severe pain around my kidney area. I've consumed 3liters of water today and urinated x2. Should i go to emergency?

I've just started warfarin and have severe pain around my kidney area. I've consumed 3liters of water today and urinated x2. Should i go to emergency?

Kidney pain: There are many possibilities. Most are benign but it is possible to have spontaneous bleeding into the area around the kidney if the warfarin level gets too high. Definitly need to check an inr blood test to see how thin your blood is. If the pain is severe and unrelenting, you may need a ct scan of abdomen and pelvis. ...Read more

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Does warfarin cause harm in the first month? If i found out i was pregnant at 4 weeks and switched to lovenox (enoxaparin) asap would it still cause harm?

Does warfarin cause harm in the first month? If i found out i was pregnant at 4 weeks and switched to lovenox (enoxaparin) asap would it still cause harm?

Yes it can: The risk of harm to the fetus is not insignificant from warfarin at any time during pregnancy. You should discuss this with your ob-gyn. In general, women of child-bearing age who require warfarin are strongly encouraged to use contraception to avoid pregnancy. If pregnany is desired, women are switched to Heparin or Lovenox (enoxaparin) before attempting to become pregnant. ...Read more

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Does taking warfarin for a DVT cause kidney or liver damage?

Does taking warfarin for a DVT cause kidney or liver damage?

No, not really.: Warfarin interferes with your body's ability to clot blood, so it is useful in people who have blood clots or in those who my be susceptible to abnormal clotting. In very very rare cases, warfarin may have been associated with a type of kidney damage, but this association is not well understood and even controversial as to its very existence. Routine monitoring of kidney function is adequate. ...Read more

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After sex this Sat., I bled from my vagina. Had total abd hyster July 2014. On warfarin for clot. Recently had kidney infection and stone. ?

After sex this Sat., I bled from my vagina. Had total abd hyster July 2014. On warfarin for clot.  Recently had kidney infection and stone. ?

Bleeding after sex: Being on warfarin makes you prone to easy bleeding. Depending on how "aggresive" your sex was it can cause minor vaginal trauma which could cause the bleeding. Also are you sure it was from your vagina?? And not from your urinary tract infection? Good luck ...Read more

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Can antihistamines harm my kidneys?

Can antihistamines harm my kidneys?

Probably not: One can never say "never" in medicine, but there are generally no adverse effects on the kidneys associated with antihistamines. ...Read more

Warfarin (Definition)

Warfarin is a medication used to thin the blood and to prevent or treat people with blood clots. It requires frequent blood ...Read more


Dr. Ted King
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Coumadin (Definition)

Coumadin is an anticholinergic agent which is a kind of anti-Parkinson's drug ...Read more