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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Is Dizziness, Itching, Fatigue, Irritated Skin With Vaginal Bleeding After Taking Niacin Normal?

hello i am an 18 year old young women and today, for the first time i took niacin (1000 mg) its been four hours and im still dizzy itching soar weak and just very skin irritated and in alot of pain and on top of this im bleeding vagionally, what should i do?
Thu, 13 Apr 2017
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General & Family Physician,  's  Response
Hi my dear,

I have gone through your medical history carefully and understood your concerns.

You say that you have just started to take niacin (1000 mg) for 4 hours now. It could be great if you could explain why you have been advised to take niacin. This will help understand your current health situation better.

Dizziness, itching, soar, weakness and very irritated skin you are experiencing are side effects of taking high doses of niacin. Skin irritation is due to release of prostaglandins by niacin.

Vaginal bleeding could be due to menstrual cycle.

I advise not to use niacin anymore, and report these side effects to the doctor who prescribed it to you.

Hope this helps.
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Is Dizziness, Itching, Fatigue, Irritated Skin With Vaginal Bleeding After Taking Niacin Normal?

Hi my dear, I have gone through your medical history carefully and understood your concerns. You say that you have just started to take niacin (1000 mg) for 4 hours now. It could be great if you could explain why you have been advised to take niacin. This will help understand your current health situation better. Dizziness, itching, soar, weakness and very irritated skin you are experiencing are side effects of taking high doses of niacin. Skin irritation is due to release of prostaglandins by niacin. Vaginal bleeding could be due to menstrual cycle. I advise not to use niacin anymore, and report these side effects to the doctor who prescribed it to you. Hope this helps.