英文说明书翻译
问题描述：
英文说明书翻译
Patients already on metformin (n = 491) at a dose of at least 1500 mg per day were randomized after completing a 2-week, open-label, placebo run-in period.
答
每天至少服用二甲双胍(分子量 491)1500mg的病人,在经过一个为期2周的,开放标记的无效药物试验后被随机分配.