So.. earlier today I read some articles on taking a high dose 3000mg to 9000mg of niacin split into 3 per day to treat mental illness. Anyways, I took 3000mg(6 capsules) an hour ago and it's the best thing I've ever taken in terms of relieving my dpdr. I'm primarily posting to see others opinion on niacin and go gain some knowledge on it as well. I am considering upping my dose to the upper limit of 9000mg. I can't find any articles on the overdose dosage.