Improvements in detection systems and methods for predicting...

G - Physics – 01 – N

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Details

G01N 1/38 (2006.01) B01F 1/00 (2006.01) G01N 13/00 (2006.01) G01N 21/33 (2006.01) G01N 21/35 (2006.01) G01N 21/64 (2006.01) G01N 21/65 (2006.01) G01N 24/08 (2006.01) G01N 27/26 (2006.01) G01N 33/15 (2006.01) G01N 37/00 (2006.01) G01R 33/46 (2006.01)

Patent

CA 2257106

The present invention relates to an improvement in a detection system used for continuously measuring the release of a drug from a pharmaceutical dosage form comprising a singular dissolution vessel or multiple dissolution vessels containing a dissolution medium and a measuring device for detecting the amount of drug released at a given time, the improvement comprising a mixing shaft and a probe placed within the mixing shaft or outside the individual dissolution vessels, the probe capable of measuring the dissolution characteristics using UV, IR, near-IR, fluorescence, electrochemical, and Raman spectroscopy techniques. The present invention also relates to a method for predicting the dissolution curve provided by a controlled release pharmaceutical dosage form comprising taking continuous measurements of the amount of drug released from a dosage form for a portion of the time over which the drug is expected to be released and predicting the remainder of the dissolution curve based on the values obtained.

La présente invention concerne une amélioration apportée à un système de détection utilisé pour mesurer en continu la libération d'un médicament d'une forme galénique pharmaceutique. Ce système comprend un récipient unique ou plusieurs récipients de dissolution contenant un milieu de dissolution, et un dispositif de mesure servant à détecter la quantité de médicament libéré à un moment donné. Ce système amélioré comprend une tige de mélange et une sonde placée dans la tige de mélange ou à l'extérieur des récipients de dissolution, la sonde pouvant mesurer les caractéristiques de dissolution selon des techniques de spectroscopie aux ultraviolets, aux infrarouges, aux infrarouges proches, à fluorescence, électroniques et Raman. La présente invention concerne également un procédé de prédiction de la courbe de dissolution obtenue par une forme galénique pharmaceutique régulée, ce procédé consistant à prendre des mesures en continu de la dose de médicament libéré d'une forme galénique sur une durée pendant laquelle il est prévu que le médicament se libère, et à calculer le reste de la courbe de dissolution en fonction des valeurs obtenues.

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