A comparison of the side effects of atenolol and propranolol in the treatment of patients with hypertension

A single-blind study was conducted in 52 hypertensive patients, aged 25 to 68 years, to compare the side effects of an equally effective antihypertensive regimen of propranolol and atenolol. All patients had a history of side effects with beta-blocker therapy. Patients were treated with propranolol 40 to 160 mg bid for 8 weeks, followed by atenolol 50 to 100 mg given once daily for 8 weeks, and then rechallenged with the required dosage of propranolol for 8 weeks. Mean systolic and diastolic blood pressures were controlled during all three treatment phases. Side effects showed a definite trend toward improvement during the atenolol treatment phase. CNS side effects, in particular, showed significantly (P less than .05) reduced severity scores and overall incidence rates during the atenolol treatment phase. In conclusion, this study showed that at equally effective antihypertensive dosages the hydrophilic beta blocker atenolol produced significantly fewer CNS side effects than the lipophilic beta blocker propranolol.
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