in two separate but similarly designed placebo-controlled studies , the efficacy of metoprolol cr/zok 50 mg once daily was evaluated in 64 patients ( mean age 53 years ) with mild hypertension ( study i ) and in 34 elderly patients ( mean age 68 years ) with mild to moderate hypertension ( study ii ) .
C0025859
metoprolol
C0020538
hypertension