Ophthalmic composition containing n-acetyl-cysteine for the...

A - Human Necessities – 61 – K

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A61K 9/00 (2006.01) A61K 31/195 (2006.01) A61K 47/36 (2006.01) A61P 27/04 (2006.01)

Patent

CA 2454918

An ophthalmic pharmaceutical composition containing acetyl cysteine as the active ingredient having a mucolitic action, suitable for administration in eyedrops, where N-acetyl-cysteine is neutralised with base DEAE-dextrane in order to reach pH levels preferably between 6.0 and 7.5, and having a physiologically acceptable osmolarity less than 320 mOsm/kg. The presence of a neutralising agent for N-acetyl-cysteine that does not negatively affect the composition osmolarity allows the formulation to be isotonic or even hypotonic, thus avoiding the irritative and potentially damaging effects of previous ophthalmic products containing N-acetyl-cysteine

La présente invention concerne une composition pharmaceutique ophtalmique contenant de l'acétylcystèine en tant que principe actif présentant une activité mucolytique, apte à être administrée dans des gouttes ophtalmiques, dans laquelle la N-acétylcystéine est neutralisée par du DEAE-dextran basique afin d'atteindre des niveaux de pH compris entre 6,0 et 7,5, et présentant une osmolarité physiologiquement acceptable inférieure à 320 mOsm/kg. La présence d'un agent neutralisant pour la N-acétylcystéine qui n'a pas d'effet négatif sur l'osmolarité de la composition permet à la formulation d'être isotonique, voire hypotonique, évitant ainsi les effets irritants et potentiellement dommageables des produits ophtalmiques existants contenant de la N-acétylcystéine.

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