The Australian Sodium Potassium Study in Untreated Mild Hypertension

  • T. Morgan
  • C. Nowson
Conference paper


Moderate reduction in sodium intake has been shown to reduce blood pressure in people with hypertension (Parijs et al. 1973; Morgan et al. 1978; Beard et al. 1982; Morgan et al. 1986). Dietary intervention studies are difficult to blind and control, and alteration in other nutrients associated with the advice to reduce sodium intake may have contributed to the fall in blood pressure. In double-blind studies, Morgan (1982) and Maregoret al. (1982) have shown that sodium chloride tablets prevent this fall. Watt et al. (1983) could not repeat this observation, but their patients prior to dietary advice were not hypertensive and their power to detect small changes was low. Despite some 50 studies (see Morgan and Nowson 1986) that have shown a fall in blood pressure in hypertensive patients with reduction in sodium intake, there is resistance to the suggestion that this is a practical form of therapy to use in hypertension based on the following reasoning: firstly, that a low-sodium diet does not reduce blood pressure; secondly, that even if a reduced-sodium diet lowers blood pressure, it is not due to the sodium; thirdly, such a diet alteration cannot be obtained in a community setting (Logan 1986; Neyses et al. 1985); and fourthly, that it may be dangerous in some people, causing blood pressure to rise and making them more prone to volume depletion and complications if they are involved in accidents (Brown et al. 1984).


Sodium Intake Potassium Intake Sodium Restriction Dietary Compliance Urinary Electrolyte 
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Copyright information

© Springer-verlag Berlin heidelberg 1989

Authors and Affiliations

  • T. Morgan
  • C. Nowson

There are no affiliations available

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