Semisolid ophthalmic vehicles.

Area of Science:

• Ophthalmic Drug Delivery
• Pharmaceutics
• Polymer Science

Background:

• Semisolid ophthalmic vehicles are crucial for topical eye treatments.
• Traditional lipophilic ointments have a long history in ophthalmology.
• Advancements focus on hydrophilic vehicles for enhanced drug release and patient comfort.

Purpose of the Study:

• To review essential formulation and therapeutic aspects of semisolid ophthalmic vehicles.
• To outline the historical development and recent advancements in ophthalmic ointments.
• To examine hydrophilic vehicles (hydrogels) and their polymer bases.

Main Methods:

• Literature review of traditional and modern ophthalmic vehicle formulations.
• Analysis of lipophilic vehicle (ointments) history and developments.
• Examination of hydrophilic vehicles (hydrogels) based on synthetic, semisynthetic, and natural polymers.

Main Results:

• Ointments represent a traditional approach to ophthalmic drug delivery.
• Hydrogels offer diverse formulation possibilities using various polymer types.
• Recent formulations explore novel approaches to semisolid ophthalmic vehicles.

Conclusions:

• Semisolid ophthalmic vehicles encompass both traditional ointments and advanced hydrogels.
• The choice of polymer base significantly influences the properties and therapeutic efficacy of ophthalmic vehicles.
• Ongoing research focuses on developing innovative formulations for improved ocular drug delivery.