Absence of effects of prolonged simvastatin therapy on nocturnal sleep in a large randomized placebo-controlled study

621 patients at increased risk of coronary heart disease

Simvastatin 40 mg or 20 mg daily

Matching placebo

Sleep-related problems, use of sleep-enhancing medications, and responses to a sleep questionnaire about changes in sleep duration and various sleep events during the preceding month at an average of 88 weekspatient reported