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Among the various routes of administration, the oral route remains the most convenient and commonly employed route for drug delivery. The oral conventional drug delivery systems have some drawbacks, such as possibility of gastrointestinal destruction of labile molecules, low absorption of macromolecules, slow onset of action, and unavoidable fluctuation in the concentration of drugs which can either lead to under-or over medication with concomitant adverse effects, especially for drugs with small therapeutic index. Therefore, it became essential to design novel oral drug delivery systems to achieve quick dissolution, absorption, rapid onset of action and reduction of drug dose. Among those novel drug delivery systems are oral disintegrating tablets (ODTs). The purpose of this review article is to report the recent advances in ODT systems with emphasis on their preparations, characterizations and applications. Also, it highlights future prospects and possible challenges in the development of an ideal ODT system.

The aforementioned formula displayed the highest cumulative % permeated of GluS and CS through rabbit intestinal mucosa compared to the solution of drugs and other liposomal formulations (64.20% for GluS and 78.21% for CS) after 2 hours. There were no histopathological alterations in the intestinal tissue, suggesting the safety of the utilized liposomal formulation. In light of the above, liposomes can be considered promising oral permeation-enhancer system for GluS and CS, which is worthy of future bioavailability experimentation.

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