Objective: To compare the efficacy and tolerability of bisoprolol, enalapril and nifedipine retard in the treatment of mild to moderate essential hypertension.
Methods: This is a randomized, double-blind, multicenter clinical trial. 331 patients with mild to moderate hypertension in the army troop were randomly allocated to receive domestic bisoprolol ( n =110,5 mg/d),enalapril ( n =111,10 mg/d) and nifedipine retard ( n =110,20 mg/day). Total duration of active drug treatment was 4 weeks.
Results: The total efficacy rates of domestic bisoprolol, enalapril and nifedipine retard were 80.0%, 82.0% and 81.8% respectively P > 0.05 . The incidences of adverse events were 4.5%, 8.1% and 19.1% (P < 0.01 ) in patients of bisoloprol, enalapril and nifedipine retard groups respectively. The adverse effects were mild in all the three groups.
Conclusions: Domestic bisoprolol, enalapril and nifedipine retard are effective and well-tolerated in patients with mild to moderate essential hypertension. The occurrence of adverse effects were least in the bisoprolol group and most in the nifedipine retard group.