Formulations containing propofol and a sulfoalkyl ether...

A - Human Necessities – 61 – K

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Details

A61K 31/05 (2006.01) A61K 31/724 (2006.01) A61K 47/40 (2006.01) A61K 47/48 (2006.01) A61P 23/00 (2006.01) A61P 25/20 (2006.01)

Patent

CA 2441744

An injectable formulation of a sedative hypnotic drug, such as the anesthetic drug propofol, that is pharmaceutically stable and demonstrates a reduced incidence of pain upon injection. The formulation of the present invention employs a sulfoalkyl ether cyclodextrin solubilizing and complexing excipient, such as CAPTISOL ® cyclodextrin (sulfobutyl ether .beta.-cyclodextrin) to form a true aqueous solution and not a suspension. This formulation minimizes the allergic response and microbial contamination issues typically associated with propofol parenteral formulations. The present formulation may also reduce pain on injection as compared to the known emulsion type propofol formulations. The liquid formulation can be sterile filtered unlike emulsion- type formulations of sedative hypnotics. The liquid formulation can be lyophilized or otherwise dried to yield a solid formulation.

L'invention concerne une préparation injectable d'un médicament hypnotique sédatif, tel que le propofol médicamenteux anesthésiant, stable au plan pharmaceutique et peu douloureuse à l'injection. Dans la préparation de l'invention, on utilise un excipient solubilisant et complexant la cyclodextrine d'éther sulfoalkylique, tel que la cyclodextrine CAPTISOL ® .beta.-cyclodextrine d'éther sulfobutylique) pour former une solution aqueuse véritable et non une suspension. Ladite préparation permet la réduction au minimum de la réponse allergique et les cas de contamination microbienne généralement associés aux préparations parentérales au propofol. Elle réduit également la douleur à l'injection par rapport aux préparations au propofol en émulsion. A l'état liquide, elle peut être filtrée en milieu stérile à la différence des préparations du type émulsions d'hypnotiques sédatifs. Elle peut être lyophilisée ou séchée par un autre procédé, pour la production d'une préparation solide.

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