Improved medicinal compositions comprising buprenorphine and...

A - Human Necessities – 61 – K

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A61K 45/06 (2006.01) A61P 25/04 (2006.01)

Patent

CA 2678568

An analgesic composition, in parenteral unit dosage form or in a unit dosage form suitable for delivery via the dermis or mucosa, comprises buprenorphine and an amount nalmefene such that the ratio by weight of buprenorphine to nalmefene delivered to or reaching the plasma of a patient is in the range 22.6:1 to 40:1. The analgesic action of the buprenorphine is potentiated by the low dose of nalmefene. Also provided are a method of treatment of pain and the use of nalmefene and buprenorphine for the manufacture of a medicament.

L'invention porte sur une composition analgésique, sous forme posologique parentérale ou sous une forme posologique apte à être administrée à travers la peau ou les muqueuses, laquelle composition comprend de la buprénorphine et du nalmefène dans une quantité telle que le rapport en poids de la buprénorphine et du nalmefène administré à un patient ou atteint dans le plasma d'un patient est compris entre 22,6:1 et 40:1. L'action analgésique de la buprénorphine est potentialisée par la faible dose de nalmefène. L'invention concerne également un procédé de traitement de la douleur et l'utilisation de nalmefène et de buprénorphine dans la fabrication d'un médicament.

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