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      Comparison of Early Side Effects with Amlodipine and Nifedipine Retard in Hypertension

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          Abstract

          The frequency and severity of adverse effects during the first 14 days of treatment with amlodipine (5 mg once daily), nifedipine retard (20 mg twice daily) or placebo were compared in a multicentre, three-way, cross-over study involving 97 patients with mild-to-moderate hypertension. All three groups of patients were well matched for age, sex and baseline blood pressure. Amlodipine and nifedipine retard produced highly significant and comparable reductions in blood pressure, indicating that the doses were therapeutically equivalent. The incidence of adverse effects considered to be definitely or probably related to nifedipine retard treatment (41%) was significantly higher than for placebo (16%, p < 0.01) or amlodipine (27%, p < 0.05). There were no significant differences in the incidence of vasodilator-related adverse effects between amlodipine and placebo. In contrast, headache, flushing and dizziness were reported more frequently by patients while on nifedipine retard than on placebo or amlodipine. The convenience of once-daily dosing, together with a lower incidence of adverse effects, with consequently fewer withdrawals from therapy, suggests that amlodipine has clinical advantages over nifedipine retard in the treatment of hypertension.

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          Author and article information

          Journal
          CRD
          Cardiology
          10.1159/issn.0008-6312
          Cardiology
          S. Karger AG
          978-3-8055-5613-2
          978-3-318-01670-3
          0008-6312
          1421-9751
          1992
          1992
          12 November 2008
          : 80
          : Suppl 1
          : 54-59
          Affiliations
          a1980 GreatWesternRoad, Glasgow, bRutherglen Health Centre, Glasgow, cDeddington Health Centre, Oxford, dChorley Old Road, Bolton, and eThe General Infirmary, Leeds, UK
          Article
          175048 Cardiology 1992;80:54–59
          10.1159/000175048
          1534716
          © 1992 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
          Session II

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