Title:Drug Delivery for Ocular Allergy: Current Formulation Design Strategies and
Future Perspectives
Volume: 29
Issue: 33
Author(s): Varaprasada Rao Regu, Ranjit Prasad Swain and Bharat Bhusan Subudhi*
Affiliation:
- Drug Development and Analysis Laboratory, School of Pharmaceutical Sciences, Siksha O Anusandhan (Deemed to be) University,
Bhubaneswar, Odisha, India
Keywords:
Ocular allergy, ocular inflammation, conjunctivitis, ocular drug delivery, translational application, novel formulations.
Abstract: The incidences of ocular allergy have been growing with the increase in pollution. Because of challenges
in new drug development, there have been efforts to maximize the efficacy of existing drugs through
drug delivery approaches. The effectiveness of drugs in ophthalmic conditions is primarily determined by
permeability across the barrier, corneal retention, and sustained release. Thus, there have been widespread efforts
to optimize these parameters to enhance efficacy through novel formulations. This review aims to analyze
the approaches to drug delivery systems to encourage further research to optimize effectiveness. With this
objective, research on drug delivery aspects of anti-allergy therapeutics was included and analyzed based on
formulation/drug delivery technique, Food and Drug Administration approval limits, residence time, compatibility,
pre-clinical efficacy, and potential for translational application. Conventional eye drops have concerns
such as poor residence time and ocular bioavailability. The novel formulations have the potential to improve
residence and bioavailability. However, the use of preservatives and the lack of regulatory approval for polymers
limit the translational application. The review may assist readers in identifying novel drug delivery strategies
and their limitations for the development of effective ophthalmic formulations for the treatment of ocular
allergy.