Topical anesthetic formulation

Details Topical anesthetic formulation Topical anesthetic formulation

A - Human Necessities

61

K

A61K 31/24 (2006.01) A61K 31/135 (2006.01) A61K 31/137 (2006.01) A61K 31/167 (2006.01) A61K 31/245 (2006.01) A61K 45/06 (2006.01) A61K 47/10 (2006.01)

Patent

CA 2388828

The topical anesthetic formulation of the present invention is typically a solution that preferably includes lidocaine, USP as the active anesthetic ingredient with benzyl alcohol and isopropyl alcohol. This invention deals with problems commonly associated with topical application of local anesthetics such as: slow onset of action; need for occlusion; messiness of creams, ointments or gels; and rapid loss of effect due to rapid systemic dispersion. The invention permits enhanced penetration of the anesthetic and thereby allows for a lesser total dosage of pharmaceutically active ingredient. The use of a lesser total dosage also decreases systemic toxicity.

L'invention concerne une formulation d'anesthésique topique. Cette formulation se présente sous la forme habituelle d'une solution contenant de préférence de la lidocaïne USP comme principe anesthésique actif et des alcools benzylique et isopropylique. Cette invention se rapporte aux problèmes habituellement associés à l'application topique d'anesthésiques locaux tels que: démarrage lent de l'action, besoin d'une occlusion, malpropreté potentielle des crèmes, d'onguents ou de gels, et perte rapide d'effet due à une dispersion générale rapide. La formulation de l'invention permet d'obtenir une meilleure pénétration de l'anesthésique et par conséquent un dosage total moins important du principe actif pharmaceutique. L'utilisation d'une quantité moindre permet aussi de réduire une toxicité systémique.

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