Purpose: To determine the in vivo efficacy of cyclosporine A-loaded solid lipid nanoparticles (SLNs) in rabbit eyes.
Methods: SLNs were prepared and administered to the cul-de-sac of rabbits, and the drug amount in aqueous humor was detected by high performance liquid chromatography (HPLC). The irritation was evaluated by modified Draize testing.
Results: The particle size of SLNs was detected as 225.9 +/- 5.5 nm with a negative surface charge. Aqueous humor drug levels reached 50.53 ng/mL, and there was no serious irritation in rabbit eyes.
Conclusions: Topical ophthalmic efficacy of cyclosporine A was enhanced via administration of SLNs.
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