Hypertension Prevention in Pre-Hypertensive Individuals

Summary

The incidence of hypertension in individuals with pre-hypertension was 80% in ten years in a study conducted in Southern Brazil. The effectiveness of non-drug interventions to prevent hypertension is low in the long term. It may be hypothesized that a population-based drug intervention could reduce relevantly the burden of hypertension and cardiovascular disease. Diuretics are at least as efficacious as other blood pressure-lowering drugs, are well tolerated, have longer duration of action and the advantage of very low cost to be used in a population intervention. Chlorthalidone is the more efficacious agent. Its main limitation is to induce hypokalemia in a proportion of patients, an adverse effect that can be antagonized by a potassium-sparing diuretic, as amiloride. A study with this objective is therefore recommendable in Brazil, in order to support a plan of precocious intervention in individuals with pre-hypertension. Such a study was demanded and funded by the Health and Technology Ministries in Brazil.

Timeline

Start

2010-07

Primary completion

2014-09

Completion

2014-09

Outcome

Met primary endpoint

paper resulting in a cumulative incidence of 11.7% in the diuretic arm versus 19.5% in the placebo arm (P=0.004). PMID 27965209 ↗

paper optimal BP was noted in 25.6% of the diuretic group and 19.3% in the placebo group (P < 0.05). PMID 29227377 ↗

Publications

• Background Fuchs FD, Fuchs SC, Moreira LB, Gus M, Nobrega AC, Poli-de-Figueiredo CE, Mion D, Bortoloto L, Consolim-Colombo F, Nobre F, Coelho EB, Vilela-Martin JF, Moreno H Jr, Cesarino EJ, Franco R, Brandao AA, de Sousa MR, Ribeiro AL, Jardim PC, Neto AA, Scala LC, Mota M, Chaves H, Alves JG, Filho DC, Pereira e Silva R, Neto JA, Irigoyen MC, Castro I, Steffens AA, Schlatter R, de Mello RB, Mosele F, Ghizzoni F, Berwanger O. Prevention of hypertension in patients with pre-hypertension: protocol for the PREVER-prevention trial. Trials. 2011 Mar 5;12:65. doi: 10.1186/1745-6215-12-65.
• Fuchs FD, Fuchs SC, Poli-de-Figueiredo CE, Figueiredo Neto JA, Scala LCN, Vilela-Martin JF, Moreira LB, Chaves H, Mota Gomes M, de Sousa MR, Silva RPE, Castro I, Cesarino EJ, Sousa ALL, Alves JG, Steffens AA, Brandao AA, Bortolotto LA, Afiune Neto A, Nobrega AC, Franco RS, Sobral Filho DC, Nobre F, Schlatter R, Gus M, De David CN, Rafaelli L, Sesin GP, Berwanger O, Whelton PK. Effectiveness of low-dose diuretics for blood pressure reduction to optimal values in prehypertension: a randomized clinical trial. J Hypertens. 2018 Apr;36(4):933-938. doi: 10.1097/HJH.0000000000001624.
• Fuchs SC, Poli-de-Figueiredo CE, Figueiredo Neto JA, Scala LC, Whelton PK, Mosele F, de Mello RB, Vilela-Martin JF, Moreira LB, Chaves H, Mota Gomes M, de Sousa MR, Silva RP, Castro I, Cesarino EJ, Jardim PC, Alves JG, Steffens AA, Brandao AA, Consolim-Colombo FM, de Alencastro PR, Neto AA, Nobrega AC, Franco RS, Sobral Filho DC, Bordignon A, Nobre F, Schlatter R, Gus M, Fuchs FC, Berwanger O, Fuchs FD. Effectiveness of Chlorthalidone Plus Amiloride for the Prevention of Hypertension: The PREVER-Prevention Randomized Clinical Trial. J Am Heart Assoc. 2016 Dec 13;5(12):e004248. doi: 10.1161/JAHA.116.004248.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	Amiloride	Small molecule	2.5 mg	Oral
Subject	Chlorthalidone	Other / unclassified	12.5 mg	Oral

Indications