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Published on: May 26, 2022
[Combination therapy of ARB with diuretics in Japanese hypertensive patients]
1Division of Hypertension, National Kyushu Medical Center.
Insights
Japanese hypertension guidelines recommend strict blood pressure control. Combination therapy with angiotensin receptor blockers (ARBs) and diuretics, like Losartan/HCTZ, effectively lowers blood pressure and manages metabolic risks.
Area of Science:
- Cardiology
- Pharmacology
- Nephrology
Context:
- The Japanese Society of Hypertension (JSH2009) guideline stresses stringent blood pressure (BP) control.
- Current treatments using calcium channel blockers (CCBs) and angiotensin receptor blockers (ARBs) show insufficient BP control in Japan.
- Dietary salt restriction (<6 g/day) is challenging for Japanese hypertensive patients.
Purpose:
- To evaluate the efficacy of combination therapy for hypertension management in a Japanese population.
- To address the challenges of achieving strict BP control and managing metabolic comorbidities.
- To explore strategies for minimizing diuretic side effects in hypertensive patients.
Summary:
- Low-dose diuretics are beneficial when salt restriction is difficult.
- Combination therapy with ARBs or ACE inhibitors is recommended to mitigate diuretic-induced metabolic side effects.
- Losartan/HCTZ combination tablets effectively reduce BP and Losartan may counteract HCTZ-induced hyperuricemia.
Impact:
- Highlights the importance of tailored combination therapies for effective hypertension management.
- Emphasizes the need for simultaneous control of metabolic risk factors (diabetes, dyslipidemia, hyperuricemia) to prevent cardiovascular events.
- Provides evidence for the utility of Losartan/HCTZ in improving BP control and metabolic profiles in hypertensive patients.
Abstract:
The new guideline for the management of hypertension issued by the Japanese Society of Hypertension (JSH2009) emphasizes strict blood pressure (BP) control. Ca channel blockers (CCB) and angiotensin receptor blockers (ARB) are mainly used in Japan, while BP control status remains insufficient. Since the achievement of salt restriction to less than 6 g/day is difficult in Japanese hypertensive patients, the use of low dose diuretics is useful. To minimize metabolic side effects of diuretics, combination therapy with ARB or ACE inhibitors is warranted. Losartan/HCTZ combination tablets effectively reduce BP when switched from the usual dose of ARB or ACE inhibitors. Since losartan has a property to increase urinary uric acid excretion, it may offset the increase in serum uric acid induced by the use of HCTZ. Metabolic disorders including diabetes, dyslipidemia and hyperuricemia are commonly prevalent in hypertensive patients. Thus, strict BP control utilizing appropriate combination therapy and the concomitant control of other metabolic risk factors are important to prevent cardiovascular events.
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