Ocular drug delivery is very challenging for the pharmaceutical scientist, as compared to other drug delivering systems. The major problem faced by the conventional dosage forms is the rapid precorneal drug loss. Hence, the main objective for the development of ocular insert is to increase the ocular bioavailability, contact time, residence time of the drug. Ocular inserts thus maintains the drug concentration in the desired range and increases the patient compliance and also it reduces the frequency of drug administration. The present article summarizes the characteristics, advantages, disadvantages, release mechanism of drug from ocular inserts, pharmacokinetic parameters and the compilation of the research work so far done in the field of development of ocular inserts.
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