| 摘要 |
Scleral plugs by which drugs can be accurately released in a specified amount to the end. The plugs are made from a mixture of a high-molecular weight polylactic acid having a molecular weight of 40,000 or more with a lowmolecular weight polylactic acid having a molecular weight of 40,000 or less and contain drugs for treating or preventing retinal or hyaloid diseases. The mixing ratio of the high-molecular weight polylactic acid to the low-molecular weight polylactic acid preferably ranges from 90/10 to 50/50, still preferably from 90/10 to 70/30, the most desirable ratio thereof being 80/20. The molecular weight of the high-molecular weight polylactic acid preferably ranges from 40,000 to 200,000, while that of the low-molecular weight polylactic acid preferably ranges from 3,000 to 40,000, still preferably from 5,000 to 20,000. The drugs are exemplified by antiulcer agents, antiviral agents, antiinflammatory agents, antifungal agents and antibacterial agents.
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