Pill with imprint KOS 500 is White, Oval and has been identified as Niaspan 500 mg. It is supplied by Kos Pharmaceuticals.

Niacin is used in the treatment of High Cholesterol; Dietary Supplementation; Hyperlipoproteinemia; Hyperlipoproteinemia Type IV, Elevated VLDL; Hyperlipoproteinemia Type V, Elevated Chylomicrons VLDL and belongs to the drug classes miscellaneous antihyperlipidemic agents, vitamins. Risk cannot be ruled out during pregnancy. Niacin 500 mg is not a controlled substance under the Controlled Substances Act (CSA).