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Effect of nifedipine on plasma catecholamines in man at rest and during exercise

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Summary

Blood pressure, heart rate, and plasma catecholamine concentrations were measured in 9 normotensive volunteers during a randomized cross-over study of oral nifedipine (10 mg×5) and placebo; measurements were made at rest and during maximal anaerobic exercise. At rest nifedipine reduced blood pressure and increased heart rate and plasma noradrenaline, whereas plasma adrenaline did not change. During exercise, the blood pressure response was similar in nifedipine and placebo treated subjects; however, heart rate was significantly higher with nifedipine. Plasma noradrenaline increased more during exercise in nifedipine-treated subjects. By contrast, nifedipine inhibited the increase in plasma adrenaline induced by exercise.

The results suggest that peripheral vasodilatation induced by nifedipine is responsible for increased sympathetic nerve activity, both at rest and during exercise, and that nifedipine inhibits adrenaline secretion in man.

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Authors and Affiliations

  1. Département de Pharmacologie Clinique, Hôpital Henri Mondor, Créteil, France

    G. Defer & F. Lhoste

  2. Centre d'Etudes et de Recherches de Médecine Aérospatiale, Paris, France

    Y. C. Guezennec

Authors
  1. G. Defer
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  2. Y. C. Guezennec
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  3. F. Lhoste
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Defer, G., Guezennec, Y.C. & Lhoste, F. Effect of nifedipine on plasma catecholamines in man at rest and during exercise. Eur J Clin Pharmacol 30, 727–729 (1986). https://doi.org/10.1007/BF00608224

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  • DOI: https://doi.org/10.1007/BF00608224

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