Extended release buccal bioadhesive tablet

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/20 (2006.01) A61K 9/00 (2006.01) A61K 9/22 (2006.01)

Patent

CA 2341375

A bioadhesive tablet wherein the active ingredient may be protected from water or the surrounding environment, thereby protecting it from metabolism or from other degradation caused by moisture, enzymes, or pH effects, and making it bioavailable only at a controlled rate. The active ingredient may be protected from moisture during the manufacturing process and more importantly may be protected from moisture and the immediate septic environment until after the patient has applied the tablet, and then only at a slow and controlled rate. It is by this process of progressive hydration that the active ingredient remains protected for many hours after administration. It is also by the process of progressive hydration that controlled and sustained release is achieved because only that part of the active ingredient that is the hydrated (aqueous) fraction of the tablet is available for absorption (bioavailable).

L'invention concerne un comprimé bioadhésif dont l'ingrédient actif peut être protégé contre l'eau ou le milieu environnant et, par conséquent, contre le métabolisme ou une autre dégradation due à l'humidité, les enzymes ou les effets du pH. Cet ingrédient actif est ainsi rendu biodisponible à des taux régulés. En outre, cet ingrédient actif peut être protégé contre l'humidité lors de la fabrication du comprimé et, ce qui est plus important, il peut être protégé contre l'humidité et le milieu septique immédiat après l'administration du comprimé mais uniquement à un taux régulé et lent. C'est ce processus d'hydratation progressive qui permet à l'ingrédient actif de continuer à être protégé plusieurs heures après son administration. Ce processus d'hydratation progressive permet également une libération lente et prolongée car seule la partie de l'ingrédient actif qui constitue la fraction hydratée (aqueuse) du comprimé est disponible pour être absorbée (biodisponible).

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