For those who test often and use Humalog. How long do you find Humalog to lower your sugar after injection

and how much does it lower your sugar in the last hour? I know there is no cut and dry answer being there are many factors involved but I'd like to have a general idea.

My humalog usually peaks at 1 hour and 45 minutes and lasts 3 and a half hours. The last hour of the humalog activity is certainly the weakest for me. I would guess that the activity for the last hour is about 80% of my pump’s calculated IOB. Or in easier to understand terms: the last hour is 80% as effective as the first hour.

Mine is similar to capin101. works about that long. Even now that i'm not doing injections and am on a pump, Humolog works the same way.