Process for producing stable medicinal composition, and pharmaceutical preparation
First Claim
1. A method of increasing the physicochemical stability of a drug substance, comprising:
- providing ingredients comprising 1 part by weight of a physiologically inert powdery additive, 0.001-1 part by weight of a macromolecular additive per part by weight of said physiologically inert additive, and a drug substance selected from the group consisting of subliminal drug, volatile drug, drug hydrolyzable in the presence of water, drug with tendency to develop whiskers, hygroscopic drug, and deliquescent drug; and
processing said ingredients en bloc by means of a multi-screw extruder to produce a pharmaceutical composition containing said drug substance, wherein the substance in the composition exhibits increase physicochemical stability.
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Abstract
A process for producing a pharmaceutical composition is disclosed. In the process, 1 part by weight of a physiologically inert powdery additive, 0.001-1 part by weight of a macromolecular additive per part by weight of said insert powdery additive, and at least one drug substance are used as ingredients and processed en bloc by means of a multi-screw extruder. The drug substance used in the process can be selected from the following group: subliminable drug, volatile drug, drug hydrolyzable in the presence of water, drug which develops whiskers, and hygroscopic or deliquescent drug. The process confers increased physicochemical stability to the pharmaceutical composition and the drug substance contained therein.
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Citations
14 Claims
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1. A method of increasing the physicochemical stability of a drug substance, comprising:
providing ingredients comprising 1 part by weight of a physiologically inert powdery additive, 0.001-1 part by weight of a macromolecular additive per part by weight of said physiologically inert additive, and a drug substance selected from the group consisting of subliminal drug, volatile drug, drug hydrolyzable in the presence of water, drug with tendency to develop whiskers, hygroscopic drug, and deliquescent drug; and
processing said ingredients en bloc by means of a multi-screw extruder to produce a pharmaceutical composition containing said drug substance, wherein the substance in the composition exhibits increase physicochemical stability.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification