J
Julie
Does anyone know if vitamin C increases or decreases clotting time?
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Ross
Well-known member
http://tinyurl.com/cf7yyx 
Pardon the sarcasm. It's something new I found to play with!
Although case reports have suggested that vitamin C might increase the activity of anticoagulants in a potentially dangerous way, this interaction has not been confirmed in research studies.8 In fact, a possible interference by vitamin C with the effect of anticoagulants has also been reported.9 A 52-year-old woman maintained on 7.5 mg of warfarin per day had a shortening of the blood clotting time which was not corrected by increasing warfarin up to 20 mg per day. Further questioning revealed she had begun taking an unspecified amount of vitamin C each morning. After stopping vitamin C, the blood clotting time returned to desired levels. Based on this and other case reports, people taking warfarin should consult with their physician before taking vitamin C supplements.
Only in large amounts. You'd have to be a major Vitamin C pig to do much of anything.
Pardon the sarcasm. It's something new I found to play with!Although case reports have suggested that vitamin C might increase the activity of anticoagulants in a potentially dangerous way, this interaction has not been confirmed in research studies.8 In fact, a possible interference by vitamin C with the effect of anticoagulants has also been reported.9 A 52-year-old woman maintained on 7.5 mg of warfarin per day had a shortening of the blood clotting time which was not corrected by increasing warfarin up to 20 mg per day. Further questioning revealed she had begun taking an unspecified amount of vitamin C each morning. After stopping vitamin C, the blood clotting time returned to desired levels. Based on this and other case reports, people taking warfarin should consult with their physician before taking vitamin C supplements.
Only in large amounts. You'd have to be a major Vitamin C pig to do much of anything.
I take a moderate 500 mg every day..... Vitamin C is not an ACT issue.
Check out our favourite site when needed: www.warfarinfo.com
Check out our favourite site when needed: www.warfarinfo.com
I take 1000mg, plus whatever is in my multivitamin and have no INR issues.
witzkeyman
Well-known member
I don't take Vitamin C daily, but take 5000mg when I'm real sick. no effect on INR as I can tell.
An ounce of prevention is worth a pound of cure......try taking a reasonable amount daily.
sharon
Well-known member
I decided to take Ester C - 500mg once a day. I have a ProTime (older version) that needed to be charged - so I plugged it in and while it was charging did my test. My inr was 1.8. The only difference was that I had started the Ester C about 5 days before. I went to the coumadin home testing forum and asked if it was the Vit C or the home testing unit. Everyone on that forum blamed the C - I was thinking that I got an inaccurate reading because the machine wasn't fully charged. I stopped taking the C. I retook it 2 days later and it was back in the normal range. Does this forum think it could be the machine?
Sharon
St. Judes av 4/97
Sharon
St. Judes av 4/97
Ross
Well-known member
It should cause an increase if anything, not a decrease.
witzkeyman
Well-known member
Ross, are you trying to say that I am posing as somebody that had an AVR?One thing bothering me. Why don't you post a photo in the tawdry shirt forum and show us your scar?
Ross
Well-known member
I seriously forgot that you had posted one. My fault, sorry. It's just that some of the things you've come off with in the past seem rather wild for someone who's had heart surgery, again, sorry.
witzkeyman
Well-known member
I didn't know I was required to say certain things. lol
L
Lisa in Katy
Ross, the way I read the drug interaction info that you posted above, studies show that it could raise or lower the INR.
Witzkeyman - The body will rid itself of excess Vitamin C so there is really no reason to take more than the maximum recommended dose - 2000 mg. 90 mg is actually the RDA and most healthy humans will get that from their diet with no supplement. In fact, excess Vitamin C can cause diarrhea, so unless you want to be running at both ends, I recommend sticking to the RDA.
Witzkeyman - The body will rid itself of excess Vitamin C so there is really no reason to take more than the maximum recommended dose - 2000 mg. 90 mg is actually the RDA and most healthy humans will get that from their diet with no supplement. In fact, excess Vitamin C can cause diarrhea, so unless you want to be running at both ends, I recommend sticking to the RDA.
Ross
Well-known member
Your not. Just wild things like 5000mg of Vit C and the like. That's like way more then most anyone would conceive of taking that I know of, especially heart patents and those on Coumadin.
