Propofol and fentanyl act additively for induction of anaesthesia.

Ben-Shlomo, I; Finger, J; Bar-Av, E; Perl, A Z; Etchin, A; Tverskoy, M · Anaesthesia · 1993

rct · Level II

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Abstract

The induction dose-response of propofol was compared with the dose-response of its combination with fentanyl and with that of fentanyl alone in three groups of 60 women undergoing minor gynaecological surgery. Dose-response curves were determined for each group using bootstrap and isobolographic analyses. Propofol was found to act additively with fentanyl for induction of anaesthesia. Twenty-three percent of the ED50 of fentanyl was required in combination with 75% of the ED50 for propofol to achieve the ED50 of the combination. This indicates that, for induction of anaesthesia, propofol and fentanyl are not synergistic.

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