What is nicotinic acid (niacin)?
Nicotinic acid (niacin) is a B vitamin. An average American diet contains 15-30 mg of niacin per day. However, in treating blood cholesterol and triglyceride disorders, high doses (1-3 grams a day) of nicotinic acid are necessary. Nicotinic acid is available in several preparations that include immediate release niacin, sustained release prescription brand Niaspan, and over- the- counter (OTC) sustained release niacin. OTC preparations are not federally regulated, and some OTC preparations may have no active ingredient. Thus, they would be ineffective in either lowering LDL or raising HDL cholesterol. Some formulations of OTC sustained release niacin have been associated with liver toxicity and rare cases of fulminant (usually fatal without liver transplantation) hepatitis have been reported. The prescription brand sustained release Niaspan has been found in clinical trials to cause only minor elevations in blood liver enzymes without causing significant liver disease. Nicotinic acid i
