genuine question about stability that I am slightly embarrassed to ask
Trying to get a straight answer on this: genuine question about stability that I am slightly embarrassed to ask.
Kept a vial at room temperature for eleven days by accident. Tested it out of guilt. It was fine.
Ordered from the warehouse in the Netherlands instead of origin and the transit went from a fortnight to 11 days. Entirely different proposition in August.
You cannot infer potency from a temperature record. The record tells you what happened to the box; only a test tells you what happened to the material.
Ask me anything specific. Anything general I will probably get wrong.
best — the order this archive was captured in
On loggers, since I was sceptical and then bought one.
A small transit logger costs a fraction of a vial and records the whole journey rather than the moment of arrival. What I learned from three of them: my lane is far more stable than I assumed, the one excursion I did capture was on a weekend, and the arrival-temperature guessing I had been doing was worthless.
If you are going to argue about cold chain, argue from a chart. It is a one-off purchase and it ends the speculation permanently.
Do you know what storage condition the stability statement covers?
Do you know what storage condition the stability statement covers?
Agreed, and a logger costs less than the vial you are worrying about.
the excursion that matters is the one after reconstitution
a summer lane and a winter lane are different lanes
Not convinced. A warm pack on day six is expected behaviour from a pack designed for four.
Yes — reconstitution date on the vial. It is the number you will want and cannot reconstruct.
Correction: that stability figure covers the lyophilised powder, not the reconstituted solution. Different claim entirely.
How many days in transit, and which month?
Put a logger in three consecutive orders. Two never went above the range at all and the third spent four hours warm on a Friday. Cost me almost nothing to stop wondering.
Lyophilisation removes the water that drives most degradation pathways. That is why the dry cake is comparatively robust and the reconstituted solution is not.
Lyophilisation removes the water that drives most degradation pathways.
Disagreeing with this line only: freezing a reconstituted vial is not a safe default.
Wrote the reconstitution date on the vial for the first time last year. Have never once since wondered how old a solution is.
Split an order across two months deliberately to compare summer and winter transit on the same lane. Four days difference, same carrier.
Tracking number redacted. It identifies both ends of a shipment and that rule has no exceptions.
ask what storage condition the stability statement was written against
Agreed. The dry powder is the robust state; it is the solution that needs the care.
- 1Not convinced. A warm pack on day six is expected behaviour from a pack…7 comments in this branch · started by u/osman_eriksen