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      Phosphate-Binding Properties and Electrolyte Content of Aluminum Hydroxide Antacids

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          Abstract

          The phosphate-binding capacities of 19 liquid and solid aluminum hydroxide gel antacids were determined in vitro under varying pH conditions. The resulting data provide a basis explaining the phosphate-binding characteristics observed when patients are treated with long-term aluminum hydroxide therapy. No antacid, liquid or solid, showed significant binding at pH 1.0. Maximum phosphate binding (expressed as phosphorus; P) was observed at pH 2.0 and 3.0 for most antacids and decreased markedly at alkaline pH. The liquid antacids showed a significantly greater phosphate-binding capacity than did tablets or capsules (p < 0.01). At pH 2.0, the liquid antacids bound a mean of 22.3 mg P/5 ml. At pH 8.0 binding was reduced to a mean of 7.3 mg P/5 ml. Significant interbrand differences were observed. At pH 2.0, the solid antacids bound a mean of 15.3 mg P/tablet or capsule. At pH 8.0, binding was reduced to a mean of 5.8 mg P/tablet or capsule. Interbrand differences, while substantial, were less than those observed among the liquid antacids. Variations in sodium and potassium content were clinically insignificant for most of the antacids in this study, while the differences in phosphate-binding properties were sufficient to warrant attention in the patient with renal failure.

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          Author and article information

          Journal
          NEF
          Nephron
          10.1159/issn.1660-8151
          Nephron
          S. Karger AG
          1660-8151
          2235-3186
          1987
          1987
          05 December 2008
          : 45
          : 1
          : 16-21
          Affiliations
          Lutheran General Hospital, Park Ridge, Ill., USA
          Article
          184064 Nephron 1987;45:16–21
          10.1159/000184064
          3808143
          © 1987 S. Karger AG, Basel

          Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

          Page count
          Pages: 6
          Categories
          Original Paper

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