专利申请中的给药量问题？看美国申请的专利，claim中经常会出现不同的矛盾的给药情况，例如eylea的claim中有： 5. The method of claim 4, wherein the initial dose is at least approximately 50 micrograms of VEGF inhibitor protein. 6. The method of claim 5, wherein the initial dose is at least approximately 100 micrograms of VEGF inhibitor protein. 7. The method of claim 6, wherein the initial dose is at least approximately 1000 micrograms of VEGF inhibitor protein. 8. The method of claim 4, wherein the subsequent doses are separated in time from each other by at least four weeks. 9. The method of claim 8, wherein the subsequent doses are separated in time from each other by at least 3 to 6 months. 这里面的567，还有8和9是啥关系啊？查看更多1个回答 . 19人已关注
看不懂的系统适用性案例？EP8.0 头孢他啶 原料药 质量标准中杂质F（即吡啶）的含量测定方法如下： Impurity F. Liquid chromatography (2.2.29). Prepare the solutions immediately before use. Phosphate buffer solution. Prepare a 10 per cent V/V solution of phosphate buffer solution pH 7.0 R4. Test solution. Dissolve 0.500 g of the substance to be examined in phosphate buffer solution and dilute to 100.0 mL with the same solution.（供试品浓度为5mg/ml） Reference solution (a). Dissolve 1.00 g of pyridine R in water R and dilute to 100.0 mL with the same solvent. Dilute 5.0 mL of the solution to 200.0 mL with water R. Dilute 1.0 mL of this solution to 100.0 mL with phosphate buffer solution.（ 对照品 浓度为2.5ug/ml，限度为500ppm） Reference solution (b). Dilute 1 mL of the test solution to 200 mL with phosphate buffer solution. To 1 mL of this solution add 20 mL of reference solution (a) and dilute to 200 mL with phosphate buffer solution.（原料药浓度为0.125ug/ml（相当于供试品浓度的0.0025%），吡啶浓度为0.25ug/ml（相当于限度浓度的10%）。为什么溶液B中原料药的浓度不是供试品一样，即供试品为5mg/ml，吡啶为2.5ug/ml？这样设计是出于什么考虑？） Column: – size: l = 0.25 m, Ø = 4.6 mm; – stationary phase: octadecylsilyl silica gel for chromatography R (5 μm). Mobile phase: mix 8 volumes of a 28.8 g/L solution of ammonium dihydrogen phosphate R previously adjusted to pH 7.0 with ammonia R, 24 volumes of acetonitrile R and 68 volumes of water R. Flow rate: 1.0 mL/min. Detection: spectrophotometer at 255 nm. Injection: 20 μL. Run time: 10 min. System suitability: reference solution (b): – resolution: minimum 7.0 between the peaks due to ceftazidime and impurity F. Limit: – impurity F: not more than the area of the principal peak in the chromatogram obtained with reference solution (a) (500 ppm).查看更多5个回答 . 18人已关注
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