Solid Pharmaceutical Composition Stability via Acidic Additives
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Solution Overview
Problem
The challenge is to suppress the chemical decomposition of a specific compound represented by the general formula (1) during pharmaceutical composition formation, particularly during pressure forming processes like dry granulation, where the cyclopropylaminomethyl structure is prone to degradation, leading to the formation of a different compound.
Innovation Solution
A solid pharmaceutical composition is formulated containing the compound of formula (1) or its salt, a cellulosic excipient, and a predetermined acidic substance with a pH of 4.0 or lower, specifically using glutamic acid hydrochloride, tartaric acid, citric acid, malic acid, fumaric acid, monobasic sodium citrate, glutamic acid, aspartic acid, or alginic acid, which helps in suppressing the chemical decomposition through dry granulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pressure forming (dry granulation) is used to form the pharmaceutical composition, then the composition can be manufactured with good flowability and compressibility, but the cyclopropylaminomethyl structure of the compound decomposes chemically
Solution Approach 1:
An acidic substance with pH 4.0 or lower is introduced as an intermediary component in the pharmaceutical composition. This acidic substance acts as a protective mediator that suppresses the chemical decomposition of the cyclopropylaminomethyl structure during pressure forming, while not interfering with the manufacturing process. The acidic environment created by this intermediary prevents the harmful chemical reaction that would otherwise occur under compression.
2Stability of the object's composition
If conventional stabilization methods (adding low-melting point oils, fats, or hydrophilic substances) are used, then the compound stability may be improved, but the formulation complexity and potential adverse effects increase
Solution Approach 1:
The invention changes the chemical parameter (pH) of the pharmaceutical composition by incorporating an acidic substance with pH 4.0 or lower. This parameter change creates a chemical environment that inherently suppresses decomposition of the compound, eliminating the need for complex physical barriers or multiple stabilizing agents. The pH modification provides a straightforward chemical solution rather than a complex physical formulation approach.
Data Source
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AI summary
[Problem] To provide a solid pharmaceutical composition which contains a compound represented by general formula (1) for a salts thereof and suppresses decomposition of said compound or salt thereof, any a production method or said solid pharmaceutical composition. [Solution] This solid pharmaceutical composition contains a compound represented by general formula (1) or a salt thereof, a cellulosic excipient, and an acidic substance oil pH 4.0 or less.