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Re: [IP] unopened insulin storage
> "All four experts agree that insulin may lose some of its
> potency after 30 days in an opened vial or pen. They advise
> using the insulin before the 30-day period expires.
> Unrefrigerated insulin should definitely be discarded after the
> 30-day period, even if the vials or pens have never been
> I do not think the last sentence is a valid statement. I have been a
> type 1 diabetic for 17 years and have never thrown away a bottle of
> insulin (R, NPH, or HUMULOG) because I have stored it, unopened and
> not regrigerated, for more that 30 days. A cool dry protected place
> where it will not be shaken or disturbed works fine. Am I wrong??
Right, Chris. This is a CYA, avoid the lawsuits and complaints, not
completely accurate statement. There are lots of things that can
affect insulin, but other than heat and time, I know of nothing else
that is THAT detrimental. I see you're just a short timer with this
diabetes stuff! ;>) In my 37 years I've thrown out a vial, maybe
I called Lilly Co. and was surprised at the candor that a rep spoke
with when I asked about the effects of "exposure to sunlight". She
explained that other than the heat, that sunlight will discolor the
cresol preservative, "and nobody wants to inject a brown insulin".
And as far as the "ill effects" of a shaken insulin, the problem lies
in the bubbles you create which when measured for an injection (or
infusion) only subtracts from what you actually get. I know on a
pet DM list I'm subbed to, I can't get people out of the belief that
they are "breaking" or "separating" the insulin crystals when they
shake the vial. LOL, what other "fables" are there about insulin?
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