• Anesthesia and analgesia · Apr 1992

    Randomized Controlled Trial Comparative Study Clinical Trial

    A comparative study of transdermal 10% lidocaine gel with and without glycyrrhetinic acid monohemiphthalate disodium for pain reduction at venous cannulation.

    • T Kano, A Hashiguchi, M Nakamura, T Morioka, M Mishima, and M Nakano.
    • Department of Anesthesiology, Kumamoto University Hospital, Japan.
    • Anesth. Analg. 1992 Apr 1; 74 (4): 535-8.

    AbstractThe clinical benefits of transdermal 10% lidocaine base gels with and without 3% glycyrrhetinic acid monohemiphthalate disodium (GAMHPh) for reduction of pain at venous cannulation were compared in a randomized, double-blind fashion in 24 surgical patients. After about 60 min of occlusive transdermal application, the mean pinprick pain score (1.3 +/- 1.5) in the GAMHPh group (n = 12), graded by noting the number of painful pinpricks out of five, was significantly less than that (2.5 +/- 1.7) in the control group (n = 12) (P less than 0.05). Twelve patients (eight in the GAMHPh group and four in the control group) who had a pinprick score less than 1 underwent venous cannulation without intradermal injection of a local anesthetic. The pain score at venipuncture, graded by the patients on a scale of 5, was significantly less in the GAMHPh group than that in the control group (1.9 +/- 1.1 vs 3.3 +/- 1.0, P less than 0.05). Erythema observed in 8 of the 24 patients was the only adverse local reaction. Addition of 3% GAMHPh to the lidocaine gel is useful in promoting transdermal lidocaine absorption.

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