u/EldWasAlreadyTaken

I have a question about the duration of insulin's effects. Everywhere I read, it's stated that fast acting insulin lasts for 3-5 hours. But for me it lasts 1 hour/an hour and a half.

I use humalog. Since I have a slow digestion I have to spread the insulin over the first half of the afternoon.

Wednesday for example I ate 60g of carbs, I had to bolus at 13.00 when I ate, then correction at 14.00, at 15.15 and at 16.30. I have to do like this because if I take everything at once I go in hypo. If I forget or can't do the correction, bg goes up.

When I eat pizza it's the same, I just have to do one more shot and the shots have higher doses.

So, am I getting it all wrong or does someone else share this experience?

EDIT because I forgot some important details: M38, diagnosed february of last year. I use a CGM but not a pump.

So this morning I was out of the office for a training course, and we agreed to then eat lunch together. I wasn't sure if I was coming back to the office so I grabbed the pen I keep there (in the fridge) and I stashed it in my suit pocket together with 4 or 5 needles. It stayed there for maybe 4 hours before lunch.

I did a bolus before eating, then after an hour I got the notification the my bg was at 190, so I did a correction shot but it kept going up. I ran home to do a shot and grab another pen to bring at work (luckily home work distance is less than 5 minutes), and this time I managed to make it go down.

Is the pen I was using gone? Do I have to throw it away? I was keeping it in my interior pocket, can my body heat have caused it to make it go bad? It was almost finished, but it seems to be a waste nontheless.

About the duration of insulin

Is this pen gone?