niacin and spotting in between periods

I had problems with insomnia and nervousness, and my doc told me to take niacin. After a week of taking it I started spotting although it was not my period time. The spotting lasted for a day and then it stopped. A few days later it started again. I can’t figure out if it has something to do with niacin or not.

It sounds strange to me that niacin would cause such thing but who knows. I used to take it and had no side effects at all. You know, spotting happens to women occasionally. Sometimes it could be nothing serious as this happens to some women during ovulation or if they are approaching menopause. However, spotting can be a sign of an underlying problem like endometriosis, uterine fibroids, cervical cancer, or ovarian cysts. It would be good if you had it looked at the gynecologist’s office.