1
|
Obata T, Deguchi S, Yoshitomi J, Inaba K, Urashima Y, Kobori T, Hosomi K, Nagai N, Nakada Y. Effect of storage temperature on the dispersibility of commercially available 0.1% fluorometholone ophthalmic suspension. PLoS One 2022; 17:e0277311. [PMID: 36327301 PMCID: PMC9632795 DOI: 10.1371/journal.pone.0277311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
In this study, we focused on the storage conditions and investigated the effects of low-temperature storage (10°C) on the dispersibility of active components in three formulations of fluorometholone (FLU) suspension eye-drops (one original drug and two generic drugs, P1-P3). For all three eye-drop products, before shaking by hand, white sediment anticipated to be the principal active component was seen at the vial base. In the ordinary-temperature storage group, the FLU contents per drop after shaking by hand were 0.076% in P1, 0.023% in P2, and 0.100% in P3, and the content in P2 was significantly lower than that in P1 and P3. In contrast, almost no dispersion was observed in the low-temperature group. The results after sufficient shaking of these samples with a vortex, in contrast, were such that the FLU contents per drop were 0.063% in P1, 0.086% in P2, and 0.088% in P3; the content in P1 was significantly lower than that in P2 and P3, and there was no difference between P2 and P3. Moreover, we evaluated the dispersibility according to the evaluation “Vs / (ρg − ρf) g.” In both the low- and ordinary-temperature storage groups, the value of Vs / (ρg − ρf) g, proportional to the terminal velocity, decreased in the following order: P3 > P1 ≫ P2, and each value in the ordinary-temperature was higher than that in low temperature. The zeta potential decreased in the following order: P2 > P3 ≫ P1. In conclusion, when FLU suspension eye drops are stored at low temperatures until use, such as in a refrigerator, ordinary shaking does not help achieve dispersion to the specified concentration, and even with vigorous shaking with some formulations, the specified concentration cannot be achieved.
Collapse
Affiliation(s)
- Tokio Obata
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Osaka, Japan
| | - Saori Deguchi
- Faculty of Pharmacy, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Jyoji Yoshitomi
- Faculty of Pharmacy, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Kazunori Inaba
- Faculty of Pharmacy, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Yoko Urashima
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Osaka, Japan
| | - Takuro Kobori
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Osaka, Japan
| | - Kouichi Hosomi
- Faculty of Pharmacy, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Noriaki Nagai
- Faculty of Pharmacy, Kindai University, Higashi-Osaka, Osaka, Japan
| | - Yuichiro Nakada
- Faculty of Pharmacy, Osaka Ohtani University, Tondabayashi, Osaka, Japan
- * E-mail:
| |
Collapse
|
2
|
Yoshitomi J, Sato A, Hayakawa K, Senda K, Yoshimi T. [A case of sterno-costo-clavicular hyperostosis associated with Schoenlein-henoch purpura found at the time of surgical treatment of tooth-root cyst]. Nihon Naika Gakkai Zasshi 1993; 82:1102-4. [PMID: 8228489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
3
|
Takeuchi H, Konami T, Takayama H, Tomoyoshi T, Yoshitomi J. Lobulated polypoid tumor of the ureter showing histologically high grade malignancy: report of a case. Hinyokika Kiyo 1989; 35:1401-4. [PMID: 2816606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A case of a lobulated polypoid tumor of the ureter showing histologically high grade malignancy is reported. Such a tumor is rare in the bladder, and to date none have been documented in the ureter. This tumor is probably the most malignant urothelial tumor of the inverted type in the urinary tract, including inverted papilloma.
Collapse
Affiliation(s)
- H Takeuchi
- Department of Urology, Shiga University of Medical Science
| | | | | | | | | |
Collapse
|
4
|
Higuchi A, Hattori Y, Yoshitomi J, Tanabe Y, Miyanomae T. [A case of Meckel's diverticulum diagnosed by 99mTcO4 abdominal scanning]. Nihon Geka Hokan 1982; 51:1051-5. [PMID: 6303238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|