Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms
Manidipine (MP) is widely used for reducing high blood pressure. Calslot<sup>®</sup> (CALS) tablets, which are the original MP medicines, and their generic medicines have been used for patients in clinical situations. The authors hypothesized that the photodegradability of MP drug substa...
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MDPI AG
2024-09-01
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| Series: | Photochem |
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| Online Access: | https://www.mdpi.com/2673-7256/4/3/23 |
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| author | Kohei Kawabata Minami Tsukimori Kyoka Hirai Shiori Akimoto Naoto Uramaru Masanori Inagaki Hiroyuki Nishi |
| author_facet | Kohei Kawabata Minami Tsukimori Kyoka Hirai Shiori Akimoto Naoto Uramaru Masanori Inagaki Hiroyuki Nishi |
| author_sort | Kohei Kawabata |
| collection | DOAJ |
| description | Manidipine (MP) is widely used for reducing high blood pressure. Calslot<sup>®</sup> (CALS) tablets, which are the original MP medicines, and their generic medicines have been used for patients in clinical situations. The authors hypothesized that the photodegradability of MP drug substance in CALS tablets might be enhanced when the tablets were photo-exposed after the change of the dosage form by the presence of riboflavin (RF), which is utilized as a coloring agent and a well-known photosensitizer. The present study clarified that RF enhanced the photodegradation of MP when the powders and the suspensions of CALS tablets were ultraviolet light (UV) irradiated. The addition of RF to the suspension of MP standard substances also promoted MP photodegradation along with the increase of the generation rate of its main photoproduct, benzophenone. Finally, the authors performed the photostabilization of MP suspensions based on the addition of quercetin (QU), which is one of polyphenols and has both the antioxidative potency and the UV filtering potency. It is summarized that QU has a protective potency for MP’s own photodegradation, and it partially suppresses the photocatalytic effect of RF. Further studies focused on the photochemical behaviors of utilized additives for medicines are needed for their safe use. |
| format | Article |
| id | doaj-art-db784bffa53d4f1886a144856ef37dfe |
| institution | OA Journals |
| issn | 2673-7256 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photochem |
| spelling | doaj-art-db784bffa53d4f1886a144856ef37dfe2025-08-20T01:55:46ZengMDPI AGPhotochem2673-72562024-09-014337738710.3390/photochem4030023Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage FormsKohei Kawabata0Minami Tsukimori1Kyoka Hirai2Shiori Akimoto3Naoto Uramaru4Masanori Inagaki5Hiroyuki Nishi6Faculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima 731-0153, JapanFaculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima 731-0153, JapanFaculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima 731-0153, JapanAkimoto Pharmacy, Akimoto Pharmacy Corporation, 7-17, Akama-cho, Shimonoseki 750-0007, JapanSchool of Health and Social Services, Center for University-Wide Education, Saitama Prefectural University, 820 San-Nomiya, Koshigaya, Saitama 343-8540, JapanFaculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima 731-0153, JapanFaculty of Pharmacy, Yasuda Women’s University, Yasuhigashi 6-13-1, Asaminami-ku, Hiroshima 731-0153, JapanManidipine (MP) is widely used for reducing high blood pressure. Calslot<sup>®</sup> (CALS) tablets, which are the original MP medicines, and their generic medicines have been used for patients in clinical situations. The authors hypothesized that the photodegradability of MP drug substance in CALS tablets might be enhanced when the tablets were photo-exposed after the change of the dosage form by the presence of riboflavin (RF), which is utilized as a coloring agent and a well-known photosensitizer. The present study clarified that RF enhanced the photodegradation of MP when the powders and the suspensions of CALS tablets were ultraviolet light (UV) irradiated. The addition of RF to the suspension of MP standard substances also promoted MP photodegradation along with the increase of the generation rate of its main photoproduct, benzophenone. Finally, the authors performed the photostabilization of MP suspensions based on the addition of quercetin (QU), which is one of polyphenols and has both the antioxidative potency and the UV filtering potency. It is summarized that QU has a protective potency for MP’s own photodegradation, and it partially suppresses the photocatalytic effect of RF. Further studies focused on the photochemical behaviors of utilized additives for medicines are needed for their safe use.https://www.mdpi.com/2673-7256/4/3/23riboflavinmanidipinephotodegradationphotostabilityHPLC |
| spellingShingle | Kohei Kawabata Minami Tsukimori Kyoka Hirai Shiori Akimoto Naoto Uramaru Masanori Inagaki Hiroyuki Nishi Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms Photochem riboflavin manidipine photodegradation photostability HPLC |
| title | Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms |
| title_full | Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms |
| title_fullStr | Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms |
| title_full_unstemmed | Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms |
| title_short | Riboflavin as a Coloring Agent of Tablets Affects the Photostability of Manidipine after the Change of Dosage Forms |
| title_sort | riboflavin as a coloring agent of tablets affects the photostability of manidipine after the change of dosage forms |
| topic | riboflavin manidipine photodegradation photostability HPLC |
| url | https://www.mdpi.com/2673-7256/4/3/23 |
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