Following 4 weeks of treatment , mean changes in sitting BP were : placebo = -1.9 / -2.1 mmHg ; ER metoprolol 0.2 mg/kg = -5.2 / -3.1 mmHg ; 1.0 mg/kg = -7.7 / -4.9 mmHg ; 2.0 mg/kg = -6.3 / -7.5 mmHg .
