Sources of New Excipients

Patent Life Duration from Filing Date of Validity 

Modification of physicochemical property of the existing excipient has been the most successful strategy in the development of new excipients in the past three decades (24). This model has been successfully adopted for the introduction of excipients with better performance grades, such as pregelatinized starch, croscarmellose sodium, and crospovidone (25). However, the quantum of functionality improvement is limited due to a restricted range of possible modifications. 

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