Bioavailable dosage form of isotretinoin

A - Human Necessities – 61 – K

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A61K 9/14 (2006.01) A61K 9/48 (2006.01) A61K 31/07 (2006.01) A61K 31/20 (2006.01)

Patent

CA 2382065

The present invention relates to a bioavailable pharmaceutical composition of 13-cis vitamin A acid (also known as 13-cis retinoic acid and isotretinoin) and a process for preparing the same. 13-cis vitamin A acid is a relatively water insoluble compound that degrades when exposed to light and atmospheric oxygen. Due to its instability and relative insolubility, the bio-availability of the drug after oral administration is difficult to achieve and has always been a challenge to a development pharmacist. It would therefore be desirable to provide a dosage form in which the drug is stable and predictably bioavailable.

L'invention concerne une composition pharmaceutique biodisponible de la vitamine A acide 13-cis (également connue sous l'appellation d'acide rétinoïque 13-cis et isotrétinoïne), ainsi qu'un procédé de préparation associé. La vitamine A acide 13-cis est un composé relativement insoluble dans l'eau et qui se dégrade lorsqu'il est exposé à la lumière et à l'oxygène atmosphérique. Par suite de l'instabilité et de l'insolubilité relative de ce médicament, sa biodisponibilité, après son administration orale, a toujours été difficile à obtenir et a toujours constitué un problème pour un pharmacologue. Il est donc souhaitable de présenter une forme galénique dans laquelle le médicament est stable, et biodisponible de manière prévisible.

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