Pharmaceutical compositions comprising sirolimus and/or an...

A - Human Necessities – 61 – K

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A61K 31/436 (2006.01) A61K 9/22 (2006.01) A61K 9/52 (2006.01)

Patent

CA 2599758

The present invention relates to pharmaceutical compositions in particulate form or in solid dosage forms comprising sirolimus (rapamycin) and/or derivatives and/or analogues thereof. Compositions of the invention exhibit an acceptable bioavailability of sirolimus and/or a derivative and/or an analogue thereof. The pharmaceutical compositions of the invention are designed to release sirolimus in a controlled manner so that the plasma levels stays within the narrow therapeutic window that exist for this class of substances. An extended release profile, where the peak concentration has been reduced without loosing significant bioavailability, together with less variable absorption, is expected to improve the safety/efficacy ratio of the drug. Furthermore, compositions according to the invention provide for a significant reduced food effect and a delayed release of sirolimus is expected to reduce the number of gastro-intestinal related side effects.

La présente invention concerne des compositions pharmaceutiques sous forme de particules ou sous des formes solides de dosage comprenant du sirolimus (de la rapamycine) et/ou des dérivés et/ou des analogues de celui-ci. Les compositions de l'invention présentent une biodisponibilité acceptable du sirolimus et/ou d'un dérivé et/ou d'un analogue de celui-ci. Les compositions pharmaceutiques de l'invention sont conçues pour libérer le sirolimus d'une manière contrôlée de façon à ce que les niveaux dans le plasma restent à l'intérieur d'une fenêtre thérapeutique étroite qui existe pour cette classe de substances. On s'attend à ce qu'un profil de libération prolongée, où le pic de concentration a été réduit sans perte importante de la biodisponibilité, ainsi qu'une absorption moins variable améliorent le rapport innocuité/efficacité du médicament. En outre, les compositions selon l'invention produisent un effet alimentaire significativement réduit et on s'attend à ce qu'une libération retardée du sirolimus réduise le nombre d'effets secondaires concernant le système gastro-intestinal.

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