CHD Initially, 20 mg once daily at bedtime, may increase at 4-wk intervals to max 80 mg/day. 
Hyperlipidemia 10-20 mg once daily at bedtime.
 Homozygous familial hypercholesterolemia 40 mg once daily at bedtime or 80 mg/day in 3 divided doses (20, 20 & 40 mg in the morning, afternoon & evening). 
Renal insufficiency 5-10 mg.