For Co-enzyme Q10 deficiency: 150 mg daily. For mitochondrial disorders: 150-160 mg, or 2 mg/kg/day. For heart failure in adults: 100 mg per day divided into 2 or 3 doses. For recent myocardial infarction: 120 mg daily in 2 divided doses. For high blood pressure: 120-200 mg per day divided into 2 doses. For isolated systolic hypertension: 60 mg twice daily. For preventing migraine headache: 100 mg three times daily. For Parkinson's disease: 300 mg, 600 mg, 1200 mg and 2400 mg per day in 3-4 divided doses. For infertility in men: 200-300 mg per day. For muscular dystrophy: 100 mg per day.
Dividing the total daily dose by taking smaller amounts two or three times a day instead of a large amount all at once can help to reduce side effects.