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'Water pills' just as effective as costly BP drugs: Study

Washington , Fri, 13 Aug 2010 ANI

Washington, August 13 (ANI): A new long-term data from a landmark study has found that expensive brand-name medications to lower blood pressure are no better at preventing cardiovascular disease than older, generic diuretics.

 

Paul Whelton is president and CEO of Loyola University Health System and chairman of the Antihypertensive and Lipid-Lowering Treatment to Prevent Heat Attack Trial (ALLHAT), which has examined the comparative value of different blood pressure-lowering medications.

 

More than 33,000 patients with high blood pressure were randomly assigned to take either a diuretic (chlorthalidone) or one of two newer drugs, a calcium channel blocker (amlodipine) or an ACE inhibitor (lisinopril).

 

In 2002, ALLHAT researchers reported that among patients followed for four-to-eight years, the diuretic was better than the calcium channel blocker in preventing heart failure and better than the ACE inhibitor in preventing stroke, heart failure and overall cardiovascular disease.

 

In the new study, researchers followed ALLHAT participants for an additional four to five years after completion of the trial, bringing the total follow-up period to between eight and 13 years. During this longer follow-up period, the differences between the three drugs narrowed-by most measures they were a statistical dead heat.

 

But the diuretic still was superior in two measures: Compared with the diuretic group, the ACE inhibitor group had a 20 percent higher death rate from stroke, and the calcium channel blocker group had a 12 percent higher rate of hospitalizations and deaths due to heart failure.

 

Diuretics, sometimes called "water pills," are the traditional medications for high blood pressure. They cause kidneys to remove sodium and water from the body, thereby relaxing blood vessel walls.

 

ACE inhibitors such as lisinopril (brand names, Prinivil(r) and Zestril(r)) decrease chemicals that tighten blood vessels. Calcium channel blockers such as amlodipine (brand name, Norvasc(r)) relax blood vessels.

 

Diuretics cost 25 dollars to 40 dollars per year, while newer brand-name hypertension drugs can cost 300 dollars to 600 dollars per year.

 

The National Heart, Lung and Blood Institute recommends patients control their blood pressure by first controlling their weight, exercising, reducing sodium, increasing potassium and drinking alcohol in moderation.

 

The institute says that if lifestyle changes are not sufficient, diuretics then normally should be the drug of first choice.

 

Paul Whelton, reported the results on Aug. 13 at the plenary session of the China Heart Congress and International Heart Forum in Beijing. (ANI)

 


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