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Toxicological evaluation of imipramine in combination with adriamycin and strophanthin

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Abstract

Chronic oral administration of imipramine to rats caused characteristic changes of the electrocardiogram (ECG), i.e. prolongation of the PR interval, widening of the QRS complex, and increase in T-wave voltage. The cardiotoxic anthracycline antibiotic adriamycin induced dose-dependent widening of the QRS complex. This effect on intraventricular conduction was not enhanced in rats receiving both drugs. The high adriamycin dose (5×4 mg/kg) abolished imipramine-induced prolongation of the PR interval and T-wave elevation. This was not seen with the low adriamycin dose (20×1 mg/kg). Imipramine prolonged survival time of rats treated with toxic doses of adriamycin, but enhanced growth retardation in animals receiving the low adriamycin dose.

Chronic treatment with increasing doses of strophanthin induced significant flattening of the T wave in rats with and without imipramine therapy, but did not influence the changes of the ECG or body weight gain caused by imipramine.

It is concluded that the combined use of imipramine and adriamycin or strophanthin did not lead to a serious enhancement of the toxicity of the tricyclic antidepressant.

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Authors and Affiliations

  1. Institute of Toxicology, Federal Institute of Technology and University of Zurich, Schorenstrasse 16, 8603, Schwerzenbach, Switzerland

    G. Zbinden, J. Elsner & H. Bolliger

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  1. G. Zbinden
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  2. J. Elsner
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  3. H. Bolliger
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Dedicated to K. Bucher on the occasion of his 65th birthday.

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Zbinden, G., Elsner, J. & Bolliger, H. Toxicological evaluation of imipramine in combination with adriamycin and strophanthin. Agents and Actions 7, 341–346 (1977). https://doi.org/10.1007/BF01969566

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