# Refilling the Lilly KwikPen disposable pen

**URL:** https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725
**Category:** Tips
**Created:** [August 26, 2017, 3:25pm UTC](https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725 "2017-08-26T15:25:35Z")
**Posts on this page:** 1
**Showing post:** 10

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### Author: ![Michel](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/michel/32/387_2.png) [@Michel](https://forum.fudiabetes.org/u/Michel)
#### Post date: [September 28, 2017, 5:37am UTC](https://forum.fudiabetes.org/t/refilling-the-lilly-kwikpen-disposable-pen/1725/10 "2017-09-28T05:37:41Z")

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> [@Filling your own pens](https://forum.fudiabetes.org/t/filling-your-own-pens/1111/8):
>
> Does it matter is there is a few units of humalog left in the tip? Should it be flushed repeatedly with a sterile? dilutent?

If it was me:  
(a) I would flush it completely, because N being a mixture it itself may not be miscible with anything else, and  
(b) I would flush it with the new insulin we are putting into the pen.

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