My symptoms started a few days after I started taking a new multivitamin that has 5 times as much of the daily requirement of
Niacin (B3). When I googled the symptoms of
Niacin overdose, low and behold, I had three of the five.......itchy, dizziness, constipation. I am thrilled to be able to get a full night's sleep again. I decided to post my experience in hopes that it may help someone else.