美国OTC与处方药区别及Rx-to-OTC转换路径
OTC与处方药的核心区别在是否需要医师处方，监管路径也迥异。本文对比两者在安全阈值、标签、广告上的差异，并解析Rx-to-OTC转换的FDA评审逻辑与典型案例，帮助企业理解品类升级机会。
OTC专论查询实操：OTCMonographs@FDA与官方检索入口
判断产品能否按OTC专论上市，第一步是查到正确的专论。本文演示如何通过OTC Monographs@FDA门户、ePDFA与21 CFR定位你的品类专论，读懂「视为最终命令」状态，避免凭经验误判合规边界。
如何读懂NDC编码：Labeler/Product/Package三段式
NDC不是随机编号，而是由标签商、产品、包装三段构成的药品身份证。本文拆解10位与12位两种格式的三段含义、格式差异与企业映射要点，帮助读者一眼读懂任意NDC并避免编码错配。
21 CFR Part 331 -- Antacid Products for Over-the-Counter (OTC) Human Use
21 CFR Part 331 -- Antacid Products for Over-the-Counter (OTC) Human UsePART 331—ANTACID PRODUCTS FOR OVER-THE-COUNTER (OTC) HUMAN USEAuthority:21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source:39 FR 19874, June 4, 1974, unless otherwise noted.Subpa
21 CFR Part 333 Subpart B - First Aid Antibiotic Drug Products
21 CFR Part 333 Subpart B - First Aid Antibiotic Drug ProductsSubpart B—First Aid Antibiotic Drug Products§ 333.101 Scope.(a) An over-the-counter first aid antibiotic drug product in a form suitable for topical administration is generally recognized
21 CFR Part 332 - Antiflatulent Products for Over-the-Counter Human Use
21 CFR Part 332 - Antiflatulent Products for Over-the-Counter Human UsePART 332—ANTIFLATULENT PRODUCTS FOR OVER-THE-COUNTER HUMAN USEAuthority:21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source:39 FR 19877, June 4, 1974, unless otherwise noted.Subpar
21 CFR Part 333 Subpart C—Topical Antifungal Drug Products
21 CFR Part 333 Subpart C—Topical Antifungal Drug ProductsSubpart C—Topical Antifungal Drug ProductsSource:58 FR 49898, Sept. 23, 1993, unless otherwise noted.§ 333.201 Scope.(a) An over-the-counter antifungal drug product in a form suitable for topi
21 CFR Part 347 - Skin Protectant Drug Products for Over-the-Counter Human Use
21 CFR Part 347 - Skin Protectant Drug Products for Over-the-Counter Human UsePART 347—SKIN PROTECTANT DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USEAuthority:21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source:58 FR 54462, Oct. 21, 1993, unless otherwi
21 CFR Part 333 Subpart D—Topical Acne Drug Products
21 CFR Part 333 Subpart D—Topical Acne Drug ProductsSubpart D—Topical Acne Drug ProductsSource:56 FR 41019, Aug. 16, 1991, unless otherwise noted.§ 333.301 Scope.(a) An over-the-counter acne drug product in a form suitable for topical application is
21 CFR Part 350 - Antiperspirant Drug Products for Over-the-Counter Human Use
21 CFR Part 350 - Antiperspirant Drug Products for Over-the-Counter Human UsePART 350—ANTIPERSPIRANT DRUG PRODUCTS FOR OVER-THE-COUNTER HUMAN USEAuthority:21 U.S.C. 321, 351, 352, 353, 355, 360, 371.Source:68 FR 34291, June 9, 2003, unless otherwise
