?:definition
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Polymers added to sustained release formulations to control and maintain the rigidity of the matrix over a prolonged period (e.g. sustained-release agent; matrix for sustained release; rate-controlling polymer for sustained release). (Adapted from \'The Role of Oral Controlled Release Matrix Tablets in Drug Delivery Systems\', Ali Nokhodchi1, Shaista Raja1, Pryia Patel1, Kofi Asare-Addo BioImpacts, 2012, 2(4), 175-187)
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