Continued importance of diuretics and beta-adrenergic blockers in the management of hypertension.
The use of thiazide diuretics as one of the preferred antihypertensive medications has stood the test of time. Since the introduction of orally effective agents in 1957 to 1958, these drugs have continued to prove their usefulness. Numerous clinical trials have confirmed that these medications are as or more effective in reducing blood pressure and cardiovascular events than any of the other effective antihypertensive agents. Although some metabolic changes may occur with higher dosages of these medications, they seem to be of limited clinical significance. In addition to being well tolerated and effective. thiazide-type diuretics are less expensive than other agents. This should be considered in view of the fact that quality of care is not compromised when the less expensive medication is used. beta-Blockers should also be considered as a major drug class in the management of hypertensive patients. There are few studies directly comparing these drugs with other agents. Although some data suggest that they are less effective in reducing CHD events in the elderly, there are numerous situations where beta-blockers are clearly indicated. Combination therapy with a beta-blocker and diuretic has been shown to be highly effective in reducing cardiovascular events in both diabetic and nondiabetic patients.