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本帖最后由 beiwei5du 于 2016-6-26 21:40 编辑
各位蒲友:
最近看一份PhRMA反馈给FDA的一份资料:
《PhRMA Perspectives onDrug Substance Regulatory Filing Issues》(http://images.alfresco.advanstar ... 6/article-45872.pdf)。其中谈及到“Retest period of drug substances”的问题
论坛上有很多关于API厂家设定retest period的介绍,但是针对制剂企业对于过了复验期的原料药应该如何处理的问题没有过多谈及。
该篇文章提及到两种方法:
1、API过了API厂家设定的复验日期后,制剂企业重新设置新“复验日期”,但是该复验日期需要科学制定(具体应该怎么制定呢???),那么在这重新设置的复验期内,使用该API前不需要检测。
2、API过了API厂家设定的复验日期后,制剂厂家在该时间点检测,若合格则立即使用(官方定义的立即可以允许在30天内)或者每次使用前进行检测。这样制剂企业就不需要设置相应的复验日期,但是这样的话检验次数就会很多。
现提供出来供大家讨论。
Recertification period after retesting.
Although any confusionabout the need for and appropriate use of expiration datingversus retest dating seems to have been resolved, debate continuesabout how retest periods and retest dates are used. Thetwo conflicting schools of thought are:
1. After an initial retest period as defined in the sponsor’s application,a drug substance may be tested to determine compliancewith appropriate specification and then used immediately.Continued use of the batch of drug substance wouldbe acceptable as long as the material is retested before eachuse.
2. After an initial retest period, a drug substance may be testedto determine compliance with appropriate specifications,and then a new retest date is established on the basis of availabledata about the stability of the material and sound scientificprinciples.
Recommendation. To address the question of retesting,PhRMA recommends that the revised guideline adopt the followingrecommendations about the practical interpretation ofthe term retest period for APIs:
● If compliance with the currently filed specification is demonstratedat the end of a retest period, the batch may be usedimmediately, or a new date for retesting can be established.
● A new date for retesting should be documented internally andbased on current retest results, stability data, sound scientificprinciples, the retest period filed in the NDA/DMF, and cGMPrequirements.
● Successive retest periods may not be longer than the previousretest period.
● The retested batch may be used in the manufacture of drugproduct without further testing until that new retest date,provided that it has been stored under the defined conditions.
● A batch of drug substance may be retested multiple times andassigned successive retest dates if appropriate.
● The filing of a retest period for an API in an NDA or DMFallows for these successive retest dates without specific provisionin the application.
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