The biggest difference between the brand-name drugs and the generics is price.品牌药品和仿制药品之间的最大差别是价格。I buy only brand-name products.我只买名牌产品。You can substitute generics for brand-name drugs on this health plan.按照这个医疗计划你可以用非专利药替代品牌药。The mix of ingredients in the brand-name drug is proprietary information.该品牌药品中的混合成分为专有信息。