I read the opening post twice before replying, because I had assumed the opposite. Published stability data applies specifically to the formulation studied, under the specific conditions stated. It does not automatically transfer to something reconstituted at home in a different concentration with a different…
What published stability data actually covers, and what it does not — what changed since — that is the question, and I have not found it answered plainly anywhere I have looked.
What changes if the standard account of published stability data actually covers is wrong? I ask because I have been treating it as settled and I noticed this week that I could not say why.
Working through the consequences rather than the evidence, since others here are better placed on the evidence.
I read the opening post twice before replying, because I had assumed the opposite.
Published stability data applies specifically to the formulation studied, under the specific conditions stated. It does not automatically transfer to something reconstituted at home in a different concentration with a different diluent. That caveat is not small.
A supplier stability statement tied to a named storage condition can be evaluated. One that says "store cool" cannot, and the difference between those two documents is larger than it looks.
This is the answer, and the reason it is the answer is the more useful part.
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures
Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Writing it up because I had to work it out twice and would rather nobody else did. Something changed and I would…
|
+4 | 8 | 20k | 8mo |
|
A reconstituted vial's beyond-use date and the reasoning behind common figures
Posting this under the heading it deserves: A reconstituted vial's beyond-use date and the reasoning behind common figures Everything below is what sits behind that. I have read the maintained page on this…
|
+125 | 129 | 45k | 2mo |
|
Power cut for eleven hours: how I assessed it afterwards
Posting this under the heading it deserves: Power cut for eleven hours: how I assessed it afterwards Everything below is what sits behind that. The question about power cut for eleven hours that I actually…
|
+102 | 109 | 1.4k | 9mo |
|
Freeze-thaw and why one cycle is not the same as five — a second dataset
Freeze-thaw and why one cycle is not the same as five — a second dataset — setting out what I have, and where I think it stops being reliable. Posting a small dataset on Freeze-thaw. It is mine, it is…
|
+47 | 55 | 46k | 10mo |
|
Light exposure: how much protection is proportionate?
The question in the title: Light exposure: how much protection is proportionate? I will give what I have already checked below so nobody repeats it. Trying to establish the boundary conditions on light…
|
2 | 59 | 3mo |
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Pen dose counters: what a click does and does not guarantee
On the subject in the title: Pen dose counters: what a click does and does not guarantee Working notes rather than a conclusion. Pen dose counters — I have the observation and I do not trust my interpretation…
|
+116 | 122 | 1.6k | 8mo |
|
Second pass at: Domestic fridge temperature mapping: a cheap experiment
Posting this under the heading it deserves: Second pass at: Domestic fridge temperature mapping: a cheap experiment Everything below is what sits behind that. Two things I would like separated before anyone…
|
2 | 30k | 16mo | |
|
Needle changes between doses on a reusable pen
Posting this under the heading it deserves: Needle changes between doses on a reusable pen Everything below is what sits behind that. The question about needle changes between doses that I actually want…
|
+34 | 38 | 1.5k | 10mo |
|
A pen that felt like it delivered nothing: diagnosing it afterwards
On the subject in the title: A pen that felt like it delivered nothing: diagnosing it afterwards Working notes rather than a conclusion. Question about a metering device rather than about a syringe, because…
|
+35 | 39 | 584 | 6mo |
|
Coming back to: Storing in the door of the fridge is worse than you think
On the subject in the title: Storing in the door of the fridge is worse than you think Working notes rather than a conclusion. Asking about the failure mode rather than the procedure, because the procedure is…
|
+2 | 6 | 2.1k | 1d |