An ophthalmic aqueous suspension preparation to serve as a cure for corneal herpes infection contains 9-[(2-hydroxyethoxy)methyl]guanine as an active ingredient and exhibits an improved stability. Specifically, the ophthalmic aqueous suspension preparation contains 0.2 to 5% by weight of 9-[(2-hydroxyethoxy)methyl]guanine or a pharmaceutically acceptable salt thereof, 0.05 to 1% by weight of a partially saponified product of polyvinyl acetate, and 0.01 to 1% by weight of a nonionic surfactant and has a pH of 6 to 8. Preferably, the fine crystals have a short axis of 50µm or less and a long axis of 70µm or less in length and have a ratio of the long axis to the short axis of 10:1 or less.
一种用于治疗角膜疱疹感染的眼科
水悬液制剂含有 9-[(2-羟乙氧基)甲基]
鸟嘌呤作为活性成分,并具有更好的稳定性。具体来说,该眼科
水悬浮制剂含有 0.2%至 5%(按重量计)的 9-[(2-羟乙氧基)甲基]
鸟嘌呤或其药学上可接受的盐、0.05%至 1%(按重量计)的聚
醋酸乙烯酯部分皂化产物和 0.01%至 1%(按重量计)的非离子表面活性剂,pH 值为 6 至 8。优选的是,细晶体的短轴长度为 50 微米或以下,长轴长度为 70 微米或以下,长轴与短轴的比例为 10:1 或以下。