Duros Implant

A matchstick-size proprietary device inserted under the skin which uses an osmosis-driven mechanical minipump for continuous, steady delivery of a drug—e.g., leuprolide for advanced prostate cancer—for up to 12 months
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In May of 1999, ALZA announced that it had submitted a New Drug Application for Viadur, a once-yearly DUROS implant for the palliative treatment of advanced prostate cancer, to the U.