Lipoprotein (a), or Lp(a), is a type of cholesterol that increases your risk of having a heart attack or stroke. Levels of Lp(a) below 30 mg/dL are considered normal. Niacin is the only drug that has been shown to lower Lp(a) levels, but its effect is small. We dont try to lower Lp(a). When Lp(a) is elevated, we try to lower your LDL more aggressively with cholesterol-lowering medications. Lp(a) also increases the risk of blood clots, so we generally put patients on aspirin.