Vitamin B-3 (niacin, nicotinic acid, nicotinamide) is part of the B-complex factor and is abundant in normal diet. Normally supplementation is not required since excessive intake can cause side effects such as lowering of excretion of uric acid (that can precipitate gout), dry eyes, blurred vision, swollen eyelids, etc. Hence, it is indicated only when there is proven deficiency such as pellagra or required in cases of high lipid levels, or in pemphigus as part of the treatment. Nicotinic acid is sold under the trade name of Nialip as 375 and 500 mg controlled release tablets. These are not meant for use as a nutritional supplement.