# Effectiveness of NovoLog vs Humalog in a pump

**URL:** <https://forum.fudiabetes.org/t/effectiveness-of-novolog-vs-humalog-in-a-pump/10978>\
**Category:** Insulin\
**Created:** [February 26, 2021, 4:41pm UTC](https://forum.fudiabetes.org/t/effectiveness-of-novolog-vs-humalog-in-a-pump/10978 "2021-02-26T16:41:50Z")\
**Posts on this page:** 1\
**Showing post:** 22

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**Author:** ![CarlosLuis](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/carlosluis/32/11389_2.png) [@CarlosLuis](https://forum.fudiabetes.org/u/CarlosLuis)\
**Post date:** [January 28, 2025, 6:27pm UTC](https://forum.fudiabetes.org/t/effectiveness-of-novolog-vs-humalog-in-a-pump/10978/22 "2025-01-28T18:27:39Z")

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Tandem says to change sites every 2 days with Humalog, 3 days with Novolog. It’s something to do with the reaction to the preservatives and the plastics.

I find that Humalog is less effective day 3 as my suppies are on a 3 day schedule regardless of the insulin provided by the evil Pharmacy Benefits Managers of the day.

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