Anesthetic composition for topical administration comprising...

A - Human Necessities – 61 – K

Patent

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Details

A61K 31/165 (2006.01) A61K 31/167 (2006.01) A61K 31/245 (2006.01) A61P 23/02 (2006.01)

Patent

CA 2528360

It comprises a mixture of lidocaine, prilocaine and tetracaine, or their pharmaceutically acceptable salts. The preferred composition comprises the following components in the indicated approximate w/w percentages: 1.5% of lidocaine base; 1.5% of prilocaine base; 4% of tetracaine base; 10% of methylpyrrolidone; 2% of dimethyl sulfoxide; 0.08% of topical hyaluronidase; 1.5% of guar gum; 1 % of Tween-20; 0.5% of Tween-80, and the necessary amount of water to 100%. It exhibits a a high concentration on skin, a deep anesthetic effect and a significantly more rapid onset of the anesthetic effect than comparable transdermal anesthetics.

L'invention concerne un mélange de prilocaïne, de lidocaïne et de tétracaïne, ou de sels acceptables sur le plan pharmaceutique de celles-ci. Une composition préférée de l'invention comprend les composants suivants dans les proportions approximatives suivantes indiquées en pourcentage en poids: 1,5 % de base de lidocaïne; 1,5 % de base de prilocaïne; 4 % de base de tétracaïne; 10 % de méthylpyrrolidone; 2 % de diméthylsulfoxyde; 0,08 % de hyaluronidase topique; 1,5 % de gomme de guar; 1 % de Tween 20; 0,5 % de Tween 80, et le complément d'eau nécessaire permettant d'obtenir 100 %. La forte concentration de ladite composition appliquée sur la peau permet d'obtenir un effet anesthésique profond et une apparition de l'effet anesthésique beaucoup plus rapide qu'avec des anesthésiques transdermiques comparables.

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