Cyclosporine a-loaded UniORV®: Pharmacokinetic and safety characterization

Iyama, Yosuke; Mineda, Misuzu; Sei, Shunsuke; Hirasawa, Wataru; Matahira, Yoshiharu; Seto, Yoshiki; Sato, Hideyuki; Onoue, Satomi

doi:10.1016/j.ijpharm.2019.118630

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…CyA is an amorphous compound [ 10 , 11 ], and the particle size is not always evenly distributed. Furthermore, the CyA oral solution used to prepare the 2% CyA ophthalmic solution is an emulsion [ 3 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of filtering on the effective concentration and sterility of a 2% cyclosporine ophthalmic solution: a quality improvement perspective

Ozaki,

Kobayashi,

Fujinaga

et al. 2023

J Pharm Health Care Sci

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Background Pharmaceutical companies do not sell formulations for all diseases; thus, healthcare workers have to treat some diseases by concocting in-hospital preparations. An example is the high-concentration 2% cyclosporine A (CyA) ophthalmic solution. Utilizing a filter in sterility operations is a general practice for concocting in-hospital preparations, as is the case for preparing a 2% CyA ophthalmic solution. However, whether filtering is appropriate concerning the active ingredient content and bacterial contamination according to the post-preparing quality control of a 2% CyA ophthalmic solution is yet to be verified. Methods We conducted particle size, preparation concentration, and bacterial contamination studies to clarify aforementioned questions. First, we measured the particle size of CyA through a laser diffraction particle size distribution. Next, we measured the concentration after preparation with or without a 0.45-µm filter operation using an electrochemiluminescence immunoassay. Finally, bacterial contamination tests were conducted using an automated blood culture system to prepare a 2% CyA ophthalmic solution without a 0.45 μm filtering. Regarding the pore size of the filter in this study, it was set to 0.45 μm with reference to the book (the 6th edition) with recipes for the preparation of in-hospital preparations edited by the Japanese Society of Hospital Pharmacists. Results CyA had various particle sizes; approximately 30% of the total particles exceeded 0.45 μm. The mean ± standard deviation of filtered and non-filtered CyA concentrations in ophthalmic solutions were 346.51 ± 170.76 and 499.74 ± 76.95ng/mL, respectively (p = 0.011). Regarding bacterial contamination tests, aerobes and anaerobes microorganisms were not detected in 14 days of culture. Conclusions Due to the results of this study, the concentration of CyA may be reduced by using a 0.45-µm filter during the preparation of CyA ophthalmic solutions, and furthermore that the use of a 0.45-µm filter may not contribute to sterility when preparing CyA ophthalmic solutions.

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