CA2614850A1 — Novel pharmaceutical modified release dosage form cyclooxygenase enzyme inhibitor

USPTO Abstract

Pharmaceutical modified release dosage form comprising at least one cyclooxygenase enzyme inhibitor or its pharmaceutically acceptable salts, esters, prodrugs, solvates, hydrates, or derivatives thereof as active agent, with a pharmaceutically acceptable carrier for controlling the release of the cyclooxygenase enzyme inhibitor is provided. The dosage form preferably provides a release of not more than about 60 % of the cyclooxygenase enzyme inhibitor in 1 hour and not less than about 75 % of the cyclooxygenase enzyme inhibitor after 12 hours when tested in accordance with the dissolution method (I) described herein employing Distilled water with 2.0 % Sodium lauryl sulphate as the dissolution medium or in accordance with the dissolution method (II) described herein employing pH 7.0 Phosphate buffer with 2.0% Sodium lauryl sulphate as the dissolution medium or in accordance with the dissolution method (III) described herein employing 0.001 N Hydrochloric acid with 1.0 % Sodium lauryl sulphate as dissolution medium. Further, the pharmaceutical composition of the present invention when tested in a group of healthy humans preferably achieves a mean peak plasma concentration (Cmax) after at least about 1 hour of administration of the dosage form,. The present invention also provides process of preparing such dosage form compositions and prophylactic and/or therapeutic methods of using such dosage form.