The first place to turn is your initial drug application and determine what ongoing commitment you have made to the agency concerning future stability pulls.
The FDA has archived its stability guidance in favor of the ICH guidance which might not include the answer to the annual pull question that you are looking for. In this case, you must look to other countries' guidance concerning annual stability pulls for some sort of direction.
The Eurdalex and PIC/S are very clear on the requirements for an on-going stability program. You must pull at least one batch per year of product per strength and primary packaging type to be enrolled in the stability program. FDA has been a member of PIC/S since January 1 of this year although I have not seen any move to harmonizing yet.
Annual pulls for stability are required unless you have negotiated an exception or haven't manufactured that strength/primary packaging type within the year.
-------------------------------------------
RL Johnson RAC
Manager, Global Regulatory Affairs
Denham Springs LA
United States
-------------------------------------------
Original Message:
Sent: 06-14-2011 11:18
From: Lisa Fischer
Subject: Annual stability sampling/testing
After our intitial stability study has begun (say a 36 month long term and 12 month accelerated), we pull samples annually and place those up at ICH long term conditions for the length of the shelf life determined with the initial study. At this point, our stability chambers are full and the plants are asking if it is a requirement to do the annual pulls. I have studied every ICH and FDA guidance I can find and I don't see a requirement to do annual studies. And since our change control process is effective, that should catch any changes that would necessitate a new study.
What are other pharma companies doing to keep stability studies current? I appreciate the opportunity to benchmark!
-------------------------------------------
Lisa
-------------------------------------------