Quality by design, part II: Application
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Simin Hassannejad Tabasi; Raafat Fahmy; Dennis Bensley; Charles O'Brien; Stephen
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Article
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2008
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John Wiley and Sons
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English
⚖ 654 KB
Ammonio methacrylate copolymers are commercially available as Eudragit RL/RS; they differ in the degree of quaternary ammonium group substitution, which gives them different permeabilities. These closely related polymers can be combined in various ratios to control release rate; consequently, releas