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  • Title: Enflurane, halothane, and aminophylline--uptake and pharmacokinetics.
    Author: Berger JM, Stirt JA, Sullivan SF.
    Journal: Anesth Analg; 1983 Aug; 62(8):733-7. PubMed ID: 6869859.
    Abstract:
    This study was designed to evaluate the effects of induction of enflurane or halothane anesthesia on the distribution and elimination of previously administered intravenous aminophylline, and to evaluate the effect of previously administered intravenous aminophylline on the uptake of enflurane or halothane. Fifty-four dogs were studied: 6 received no anesthetic, 24 received enflurane, and 24 halothane. The six animals receiving no anesthetic were given 10 mg/kg of aminophylline. In each of the two groups of 24 animals, six animals served as controls and received no aminophylline. Of the other 18 animals in each group, six received 10 mg/kg of aminophylline, six received 25 mg/kg of aminophylline, and six received 50 mg/kg of aminophylline intravenously before induction of enflurane or halothane anesthesia. The redistribution (alpha) phase of theophylline was similar when anesthesia was induced with either enflurane or halothane and slightly more rapid when no anesthetic was given following aminophylline administration. The elimination (beta) phase of theophylline in the presence of either anesthetic was not significantly different than when no anesthetic was administered. The uptake of enflurane or halothane was unaffected by prior administration of aminophylline. Differences in arrhythmogenicity between enflurane and halothane after aminophylline administration are not related to alterations in theophylline pharmacokinetics or anesthetic uptake.
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