著者

村上 雅裕 中谷 真由美 安田 恵 天野 学

出版者

Japanese Society of Drug Informatics

雑誌

医薬品情報学 (ISSN:13451464)

巻号頁・発行日

vol.18, no.3, pp.209-213, 2016 (Released:2017-02-14)

参考文献数

12

被引用文献数

1

---

Objective: The squeezing force and one-drop weight, suggested to directly influence adherence, were measured in 6 eye drop products containing a switch OTC drug, ketotifen fumarate, to investigate useful information for product selection.Methods: The squeeze force, one drop weight, and pH were measured using a digital force gauge, analytical balance, and pH meter, respectively.  Information on additives contained in each product was collected from package inserts.  For the total number of drops, the number per 10 mL was calculated from the obtained value.Results: The maximum squeeze force was 14.8 N of Irice AG Guard, and the one drop weight (33.2 mg) of Raferusa®AL was the minimum.  The total number of drops per 10 mL was 215 in Sutto eyes Z, being the minimum.  The pH was in the range of 5.2-5.7.  On comparison of additives among the products, a cooling agent was contained in only 2 products.Discussion: Since the squeeze force was in the range of 5.3-14.8 N, it was less likely that the squeeze force reduces usability.  Since the one-drop weights of 2 products were more than 10 mg lower than the weights of the other products, the dose may be insufficient and the effect may not be attained.  The pH was within the acceptable range in all products.  Two products contain a cooling agent as an additive, and this has to be explained beforehand.  Information related to usability, actual feeling of the effect, and sense of the use of the products containing ketotifen fumarate was collected.

著者

村上 雅裕 中谷 真由美 太田 千裕 安田 恵 天野 学

出版者

一般社団法人日本医療薬学会

雑誌

医療薬学 (ISSN:1346342X)

巻号頁・発行日

vol.43, no.10, pp.592-598, 2017-10-10 (Released:2018-10-10)

参考文献数

15

被引用文献数

1

---

To provide appropriate information concerning ethical or Rx-OTC-switch drugs containing the same ingredients by pharmacists, it is necessary to understand the properties of both. In this study, pharmaceutical properties and economics were compared between ethical and Rx-OTC-switch anti-allergy ophthalmic solutions containing tranilast, pemirolast, or acitazanolast.Regarding 14 ethical and 3 Rx-OTC-switch products, the squeeze force, drop weight, pH, specific gravity, and total number of drops were measured. The usable period per bottle and daily cost were calculated from the total number of drops.The squeeze forces of the three drugs differed about 1.5-2 times among their products. Single-drop volumes calculated from the drop weights and specific gravities ranged from 30 to 46 μL for 0.5% tranilast ophthalmic solution, larger for the original drugs than for the Rx-OTC-switch and generic ones. The pH values of the ophthalmic solutions differed among the drugs, but not among their products. The usable periods of each bottle of the three drugs were longer for the Rx-OTC-switch drugs. However, the daily drug costs of 0.1% pemirolast ophthalmic solution were higher for the Rx-OTC-switch drug than for the original one, although those of 0.5% tranilast ophthalmic solution were lower.The present study demonstrated that the squeeze forces and drop volumes differed between the Rx-OTC-switch and ethical drugs and that the usable periods of each bottle and daily costs differed among the drugs. It is important for pharmacists to obtain information on the pharmaceutical properties and economics for in order to select products for individual patients.