Cholestagel is used to lower cholesterol levels in adults with primary hypercholesterolaemia (high blood cholesterol levels). ‘ Primary ’ means that there is no disease causing the high cholesterol levels. • Cholestagel is used as an add-on to a cholesterol-lowering diet, to reduce total cholesterol and ‘ low-density-lipoprotein’ (LDL or ‘ bad ’) cholesterol levels in patients in whom a statin (another cholesterol-lowering medicine) is not appropriate or is not well tolerated; • Cholestagel is also used as an add-on to a statin and a cholesterol-lowering diet, to further reduce LDL-cholesterol levels in patients who are not adequately controlled with a statin alone.