How do you tell when Humalog goes bad?

[johgn]

I see things floating in the bottle but they are probably air bubbles. How do you tell the difference between air bubbles and "particles"?

[notme]

Particles or clumping used to happen a lot in Regular insulin. Humalog is harder as it is clear. I have never seen particles in my Humalog, but I am sure it can happen. Let the bottle sit for 1/2 hour. The bubbles (if that is what they are) should disipate. If they don't, it is safe to assume it is particles and the insulin has gone bad. Have you seen a drop in potency? That would also be a strong indicator.

[grace girl]

I've only had it happen once, but the particles were white in color, and they obviously were not air bubbles. They weren't huge, but you could see the difference. I had been having un-explained high's for about two days when I saw it, and opening a new bottle fixed everything.

[johgn]

Thanks a lot!